X^2-XY-6Y^2+3X+11Y-4

问题描述:

X^2-XY-6Y^2+3X+11Y-4

X^2-XY-6Y^2+3X+11Y-4
=(X-3Y)(X+2Y)-(X-3Y)+4X+8Y-4
=(X-3Y)(X+2Y-1)+4(X+2Y-1)
=(X+2Y-1)(X-3Y+4)