化简 (2x-1)(2x+1)-(4x+3)(x-1)
问题描述:
化简 (2x-1)(2x+1)-(4x+3)(x-1)
答
(2x-1)(2x+1)-(4x+3)(x-1)
=(4x²-1)-(4x²-x-3)
=4x²-1-4x²+x+3
=x+2