因式分解:x^4y^4-8x^2*y^2+16
问题描述:
因式分解:x^4y^4-8x^2*y^2+16
答
x^4y^4-8x^2*y^2+16
=(x^2y^2)^2-8x^2*y^2+16
=(x^2y^2-4)^2
=(xy+2)^2(xy-2)^2