Question

初二因式分解

x^4+x²y²+y^4

Answer 1

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

Answer 2

x^4+x²y²+y^4
=x^4+2x²y²+y^4-x^2y^2
=(x^2+y^2)^2-(xy)^2
=(x^2-xy+y^2)(x^2+xy+y^2)