(2/3x^3y^2+1/4x^2y-2/3x)(-12xy)^2的值
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(2/3x^3y^2+1/4x^2y-2/3x)(-12xy)^2的值
(2/3x³y²+1/4x²y-2/3x)(-12xy)²
=(2/3x³y²+1/4x²y-2/3x)(144x²y²)
=(2/3x³y²)(144x²y²)+(1/4x²y)(144x²y²)-(2/3x)(144x²y²)
=96x^5y^4+36x^4y³-96x³y²
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=(2/3x³y²+1/4x²y-2/3x)(144x²y²)
=(2/3x³y²)(144x²y²)+(1/4x²y)(144x²y²)-(2/3x)(144x²y²)
=96x^5y^4+36x^4y³-96x³y²
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