计算:(-2a)×a-(-2a)^2 (-2x^2y)×(-2/3xy)×(-8xy) 4x×(1- 3-2x/a) 注:是4分之3-2x

问题描述:

计算:(-2a)×a-(-2a)^2 (-2x^2y)×(-2/3xy)×(-8xy) 4x×(1- 3-2x/a) 注:是4分之3-2x

(-2a)×a-(-2a)^2
=-2a²-4a²
=-6a²
(-2x^2y)×(-2/3xy)×(-8xy)
=-32/3x^4y³
4x×(1- 3-2x/4)
=4x-x(3-2x)
=4x-3x+2x²
=2x²+x