不解方程组2x-y=12 x+2y=11求(2x-y)^3-(2x-y)^2(x-3y)的值^3是三次方^2是二次方

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不解方程组2x-y=12x+2y=11求(2x-y)^3-(2x-y)^2(x-3y)的值^3是三次方^2是二次方不解方程组2x-y=12x+2y=11求(2x-y)^3-(2x-y)^2(x-3y)

不解方程组2x-y=12 x+2y=11求(2x-y)^3-(2x-y)^2(x-3y)的值^3是三次方^2是二次方
不解方程组2x-y=12 x+2y=11求(2x-y)^3-(2x-y)^2(x-3y)的值
^3是三次方
^2是二次方

不解方程组2x-y=12 x+2y=11求(2x-y)^3-(2x-y)^2(x-3y)的值^3是三次方^2是二次方
(2x-y)^3-(2x-y)^2(x-3y)
=(2x-y)^2*(2x-y-x+3y)
=(2x-y)^2*(x+2y)
=12^2*11
=1584

(2x-y)^3-(2x-y)^2(x-3y)
=(2x-y)^2*(2x-y-x+3y)
=(2x-y)^2*(x+2y)
=12^2*11
=1584

(2x-y)^3-(2x-y)^2(x-3y)
=(12^3)-{12^2[2x-y-(x+2y)]}
=1584