x²-Y²-x-5y-6分解因式
问题描述:
x²-Y²-x-5y-6分解因式
很清晰了
答
原式=x²-Y²-x-5y-6
=(x²-x+1/4)-(Y²+5y+25/4)
=(x-1/2)²-(Y+5/2)²
=[(x-1/2)+(Y+5/2)][(x-1/2)-(Y+5/2)]
=(x+Y+2)(x-Y-3)