(y+1)²-(y²-4x+4)因式分解- -
问题描述:
(y+1)²-(y²-4x+4)因式分解- -
数学老差了,有什么办法
答
(y+1)²-(x²-4x+4)
=(y+1)²-(x-2)²
=(y+1-x+2)(y+1+x-2)
=(y-x+3)*(x+y-1)
(y+1)²-(y²-4x+4)
=y²+2y+1-y²+4x-4
=4x+2y-3你看清题目看清了啊,怎么了是y的平方恩,我估计你抄错了 因为有x