y²-9(x+y)²分解因式
问题描述:
y²-9(x+y)²分解因式
答
y²-9(x+y)²
=(y+3x+3y)(y-3x-3y)
=-(3x+4y)(3x+2y)
答
y²-9(x+y)²
=[y+3(x+y)][y-3(x+y)]
=(y+3x+3y)(y-3x-3y)
=-(3x+4y)(3x+2y)