题目内容
解方程:
x1 =6,x2 =-2
解: x(x + 4)=" 8x" + 12
x 2+4 x =" 8x" + 12
x 2 -4 x = 12
x 2 -4 x +22=" 12" + 22
(x - 2)2 ="16"
x - 2 =" ±" 4
x1 =6,x2 ="-2"
x 2+4 x =" 8x" + 12
x 2 -4 x = 12
x 2 -4 x +22=" 12" + 22
(x - 2)2 ="16"
x - 2 =" ±" 4
x1 =6,x2 ="-2"
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