(-2a^2b)^3+8(a^2)^2*(-a)^2*(-b)^3=

问题描述:

(-2a^2b)^3+8(a^2)^2*(-a)^2*(-b)^3=
(-3a^3)^2*a^3+(-4a)^2*a^7-(5a^3)^3=

(-2a^2b)^3+8(a^2)^2*(-a)^2*(-b)^3=-8a^6b^3+64a^4*a^2*(-b^3)=-8a^6b^3-64a^6b^3=-72b^6b^3(-3a^3)^2*a^3+(-4a)^2*a^7-(5a^3)^3=9a^6*a^3+16a^2*a^7-125a^9=9a^9+16a^9-125a^9=-100a^9