因式分解:(x+y)^2-3(x+y)-10
问题描述:
因式分解:(x+y)^2-3(x+y)-10
答
原式=(x+y)²-3(x+y)-5×2=[(x+y)-5][(x+y)+2]=(x+y-5)(x+y+2)
因式分解:(x+y)^2-3(x+y)-10
原式=(x+y)²-3(x+y)-5×2=[(x+y)-5][(x+y)+2]=(x+y-5)(x+y+2)