(x-2)的平方=0,所以x=2即x的3次方=8
x^2-4x+4=0 (x-2)^2=0x1=x2=2所以x^3=8
x^2-4x+4=0(x-2)^2=0x=2x^3=8
啊?整理得(X-2)的平方=0 解得X=2所以X的三次方等于8
(X-2)方=0 X=2X三方=8
8