Question

先化简,再求值:【2x(x的平方y-xy的平方)+xy(xy-x的平方)】,其中x=2011，y=2010

Answer 1

:【2x(x的平方y-xy的平方)+xy(xy-x的平方)】
=2x²y(x-y)-x²y(x-y)
=x²y(x-y)
=2011²*2010*(2011-2010)
=2011²*2010
=8128683210

Answer 2

原式=2x³y-2x²y²+x²y²-x³y
=x³y-x²y²
=x²y(x-y)
=2011²×2010×1
=8128683210

Answer 3

展开括号、合并。然后=x的三次方y－x的平方y的平方=x的平方y(x-y)=x的平方y=8128683210