Question

判断下哪个式子是因式分解X^2-4Y^2=(X+4Y)(X-4Y)(XY)^2-1=(XY+1)(XY-1)哪个是因式分

Answer 1

x^2-4y^2=(x-2y)(x+2y)

(xy)^2-1=(xy+1)(xy-1)

因式分解是把一个多项式分解成几个整式的积的形式.