(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
答
=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)
答
2/9x^4 + 2y^2
答
(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)