阳江市2022-2023学年度第一学期期末质量检测八年级数学试卷（含答案）.pdf

阳江市2022-2023学年度第一学期期末质量检测试卷

八年级数学学科

一、选择题

1-5：CBCCB6-10：BDACB

二、填空题

11．（2，-3）12．4213．214．-115．①②④

4xy

三、解答题（一）

16．解：x34xx(x24)·························4分

x(x2)(x2)························8分

17．解：方程两边乘上(x3)(1x)，··················1分

得2(1x)x3·······················2分

去括号得22xx3·······················3分

移项得2xx32······················4分

合并得3x1·······················5分

1

系数化为1得x·······················6分

3

132

检验：当x时，(x3)(1x)0·······················7分

33

1

∴原分式方程的解为x·······················8分

3

18．解：原式22·················4分

(2aa)(a2a1)

2aa2a22a1·················6分

4a1······················8分

1x24x4x11x1

19．解：(1)()2······················2分

x1x1x1x1x4x4

x2x1

······················6分

x1(x2)2

1

······················8分

x2

11

当x1时，原式·····················9分

123