4x²-16=0 27(x-3)³=-64

问题描述:

4x²-16=0 27(x-3)³=-64

4x^2-16=0
4x^2=16
x^2=4
x=±2
27(x-3)³=-64
[3(x-3)]³=-4^3
3(x-3)=-4
x-3=-4/3
x=3-4/3
x=5/3