题目内容
计算或解方程
(1)(2
-3
)×
-
(2)5x(x-3)=6-2x.
(1)(2
2 |
27 |
6 |
|
(2)5x(x-3)=6-2x.
(1)原式=4
-27
-
=4
-
.
(2)移项得:5x(x-3)+2(x-3)=0,
(x-3)(5x+2)=0,
x-3=0,5x+2=0,
x1=3,x2=-
.
3 |
2 |
1 |
2 |
2 |
=4
3 |
55 |
2 |
2 |
(2)移项得:5x(x-3)+2(x-3)=0,
(x-3)(5x+2)=0,
x-3=0,5x+2=0,
x1=3,x2=-
2 |
5 |
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