问题
解答题
求下列各式中x的值.
(1)(x+2)2=16
(2)(x-3)3+64=0.
答案
(1)(x+2)2=16,
x+2=±4,
则x=2或-6;
(2)(x-3)3+64=0,
(x-3)3=-64,
x-3=-4,
x=3-4,
x=-1.
求下列各式中x的值.
(1)(x+2)2=16
(2)(x-3)3+64=0.
(1)(x+2)2=16,
x+2=±4,
则x=2或-6;
(2)(x-3)3+64=0,
(x-3)3=-64,
x-3=-4,
x=3-4,
x=-1.