分解因式解4x²-4x+1=0 2(x-3)²=x²-9
问题描述:
分解因式解4x²-4x+1=0 2(x-3)²=x²-9
答
4x²-4x+1=0
(2x-1)²=0
2x-1=0
所以x1=x2=1/2
2(x-3)²=x²-9
2(x-3)²=(x+3)(x-3)
2(x-3)²-(x+3)(x-3)=0
(x-3)[2(x-3)-(x+3)]=0
x-3=0 2(x-3)-(x+3)=0
所以x1=3 x2=9