括号-1又1/5除以括号-12乘括号除以1/4。题目不正确你好好看看
(x-3)2=4(2x+1)2 [(4x+2)]2-(x-3)2=0 (4x+2+x-3)(4x+2-x+3) = 0 (5x-1)(3x+5) = 0 x1 = 1/5 x2 = -5/3
