(5x-2)(5x-2)=9(x+3)(x+3)怎么解
问题描述:
(5x-2)(5x-2)=9(x+3)(x+3)怎么解
快/完整
答
(5x-2)(5x-2)=9(x+3)(x+3)
(5x-2)^2-9(x+3)^2=0
(5x-2+3x+9)(5x-2-3x-9)=0
(8x+7)(2x-11)=0
x1=-7/8 x2=11/2