将多项式x^4+4y^4分解因式;
问题描述:
将多项式x^4+4y^4分解因式;
答
x^4+4y^4
=x^4+4y^4+4x^2y^2-4x^2y^2
=(x²+2y²)²-4x²y²
=(x²+2y²-2xy)(x²+2y²+2xy)