X^2-2X-4Y^2-4Y因式分解
问题描述:
X^2-2X-4Y^2-4Y因式分解
答
X^2-2X-4Y^2-4Y
=(X^2-2X+1)-(4Y^2+4Y+1)
=(x-1)^2-(2y+1)^2
=(x-1+2y+1)(x-1-2y-1)
=(x+2y)(x-2y-2)