计算:(3x-4y)(9x²+12xy+16y²)
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计算:(3x-4y)(9x²+12xy+16y²)计算:(3x-4y)(9x²+12xy+16y²)计算:(3x-4y)(9x²+12xy+16y
计算:(3x-4y)(9x²+12xy+16y²)
计算:(3x-4y)(9x²+12xy+16y²)
计算:(3x-4y)(9x²+12xy+16y²)
=27x^3+36x^2y+16xy^2-36x^2y-48xy^2-64y^3
=27x^3-36xy^2-64y^3