X平方+2XY+Y平方+3X+3Y-4化简
问题描述:
X平方+2XY+Y平方+3X+3Y-4化简
答
(x+y)²+3(x+y)-4
=(x+y+4)(x+y-1)
X平方+2XY+Y平方+3X+3Y-4化简
(x+y)²+3(x+y)-4
=(x+y+4)(x+y-1)