Question

解方程:(1) (2x一1)的2次方=4 (2) 3(x+2)的3次方一81=0 (请写出全部过程)

Answer 1

(2x-1)²=4

2x-1=2或2x-1=-2

解得：x=3/2或者x=-1/2

∴x1=3/2 x2=-1/2

3(x+2)³=81

(x+2)³=27

x+2=3

解得：x=1