(1/3X²-y)²+(1/3x²+y)²等于多少啊

问题描述:

(1/3X²-y)²+(1/3x²+y)²等于多少啊

=1/9x^4+y^2-2/3*(x^2)*y+1/9x^4+y^2+2/3*(x^2)*y=2/9x^4+2*(y^2)

2/9x^4 + 2y^2

(1/3X²-y)²+(1/3x²+y)²
=1/9x^4+y^2-2/3*(x^2)*y+1/9x^4+y^2+2/3*(x^2)*y
=2/9x^4+2*(y^2)