问题
解答题
解方程:(x+2)2=3x2-12.
答案
(x+2)2=3x2-12,
(x+2)2-3(x+2)(x-2)=0,
(x+2)[x+2-3(x-2)]=0,
(x+2)(-2x+8)=0,
x+2=0,-2x+8=0,
x1=-2,x2=4.
解方程:(x+2)2=3x2-12.
(x+2)2=3x2-12,
(x+2)2-3(x+2)(x-2)=0,
(x+2)[x+2-3(x-2)]=0,
(x+2)(-2x+8)=0,
x+2=0,-2x+8=0,
x1=-2,x2=4.