3x^y(-4xy^)+5xy*(-6xy)^,其中x=2 y=-1/2

问题描述:

3x^y(-4xy^)+5xy*(-6xy)^,其中x=2 y=-1/2

3x^y(-4xy^)+5xy*(-6xy)^,
=-12x³y³+5xy*36x²y²
=-12x³y³+180x³y³
=168x³y³
=168(xy)³
=168x(2x-1/2)³
=-168