Question

化简求值：1/2x的平方乘以y的立方乘以(-3xy)的平方+(-2xy)的平方乘以xy的三次方+（1/4y)的平方

乘以（2xy）的立方~ 其中x=1，y=-1

Answer 1

x²/2×y³×（-3xy)²+（-2xy)²×xy³+(y/4)²×（2xy)²
=9x^4y^5/2+4x^3y^5+x^2y^4/4
=-9/2-4+1/4
=-8.25

Answer 2

=1/2x²y³*9x²y²+4x²y²*x³y³+1/16y²*8x³y³
=9/2x^4y^5+4x^5y^5+1/2x³y^5
=-9/2-4-1/2
=-9