2(x-4)²=18 4x²-4x-3=0

问题描述:

2(x-4)²=18 4x²-4x-3=0

2(x-4)²=18
(x-4)²=9
x-4=±3
x1=7 x2=1
4x²-4x-3=0
(2x-3)(2x+1)=0
2x-3=0 或2x+1=0
x1=3/2 x2=-1/2