5x(2x²3x+4) -6x(x-3y) -2a²(1/2ab+b²) (2/3x²y-6xy)·1/2xy²
问题描述:
5x(2x²3x+4) -6x(x-3y) -2a²(1/2ab+b²) (2/3x²y-6xy)·1/2xy²
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答
数学之美团为你解答5x·(2x²-3x+4) = 10x³ - 15x²+20x- 6x·(x-3y) = - 6x² +18xy-2a²(1/2ab+b²) = - a³b - 2a²b²(2/3x²y-6xy)·1/2xy² = 1/3 x³y...