计算:(3x^2)^3-7x^3【x^3-x(4x^2+1)】-(-x^2)^2

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计算:(3x^2)^3-7x^3【x^3-x(4x^2+1)】-(-x^2)^2

计算:(3x^2)^3-7x^3【x^3-x(4x^2+1)】-(-x^2)^2
计算:(3x^2)^3-7x^3【x^3-x(4x^2+1)】-(-x^2)^2

计算:(3x^2)^3-7x^3【x^3-x(4x^2+1)】-(-x^2)^2
(3x^2)^3-7x^3[x^3-x(4x^2+1]+(-x^2)^2
=27x^6-7x^3[x^3-4x^3-x]+x^4
=27x^6+21x^6+7x^4+x^4
=48x^6+8x^4
=48/64+1/2
=3/4+1/2
=5/4
你做的是对的!

只能化简吧