(3y^2)^3-5y^2[2y^4-y(3y-1/5)]
问题描述:
(3y^2)^3-5y^2[2y^4-y(3y-1/5)]
计算化简
答
(3y^2)^3-5y^2[2y^4-y(3y-1/5)]
=(3y^2)^3-5y^2[2y^4-3y²+1/5)]
=27y^6-10y^6+15y^4-y²
=17y^6+15y^4-y²