解方程:(2x+1)(2x-1)+3(x+2)(x-2)=(7x+1)(x-1)
问题描述:
解方程:(2x+1)(2x-1)+3(x+2)(x-2)=(7x+1)(x-1)
答
(2x+1)(2x-1)+3(x+2)(x-2)=(7x+1)(x-1),
4x2-1+3x2-12=7x2-6x-1,
6x=12,
x=2.