(4x+1)(4x-1)-(2x-5)(2x+3)的计算
问题描述:
(4x+1)(4x-1)-(2x-5)(2x+3)的计算
答
=16x²-1-(4x²-4x-15)
=16x²-1-4x²+4x+15
=12x²-4x+14