问题
解答题
(1)计算:2
(2)解方程(x-3)2+2x(x-3)=0 |
答案
(1)原式=4
×(123
-3
-92
)3
=144-4
-1086
=36-4
;6
(2)提取公因式得,
(x-3)(x-3+2x)=0,
∴(x-3)(3x-3)=0,
∴方程的解为:x=3或1.
(1)计算:2
(2)解方程(x-3)2+2x(x-3)=0 |
(1)原式=4
×(123
-3
-92
)3
=144-4
-1086
=36-4
;6
(2)提取公因式得,
(x-3)(x-3+2x)=0,
∴(x-3)(3x-3)=0,
∴方程的解为:x=3或1.