当前位置:首页 > 八年级 > 数学试卷

【330730】二次根式练习题

时间:2025-02-11 18:40:10 作者: 字数:1227字

二次根式练习题

一、选择题

1.下列各式中 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> ,二次根式的个数是( ).

A4 B3 C2 D1

2.数a没有算术平方根,则a的取值范围是( ).

Aa>0 Ba≥0 Ca<0 Da=0

二、填空题

1.(- <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 2=________

2.已知 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 有意义,那么是一个_______数.

三、综合提高题

1.计算

1)( <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>2 2- <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>2 3)( <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>2 4)(-3 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 2

(5)  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

2.把下列非负数写成一个数的平方的形式:

15 23.4 3 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>4xx≥0

3.已知 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> + <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> =0,求xy的值.

4.在实数范围内分解下列因式:

1x2-2 2x4-9 3x2-5


答案:

一、1B 2C

二、13 2.非负数

三、1.(1)( <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>2=9 2- <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>2=-3 3)( <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>2= <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> ×6= <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

4)(-3 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 2=9× <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> =6 (5)-6

2.(15= <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>2 23.4= <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>2

3 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> = <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>2 4x= <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>2x≥0

3 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> xy=34=81

4.1x2-2=x+ <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> )(x- <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

2x4-9=x2+3)(x2-3=x2+3)(x+ <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> )(x- <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/198/" title="习题" class="c1" target="_blank">习题</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

(3)