Question

(3a的平方b-2ab的平方)*3ab

Answer 1

(3a的平方b-2ab的平方)*3ab

=9a^3b^2-6a^2b^3

-2(1-3x/2)-4x(2-x/4)

=-2+3x-8x+x^2

=-2-5x+x^2

2x^2(-3xy^2)-x(x^2y^2-2x)

=-6x^3y^2-x^3y^2+2x^2

=-7x^3y^2+2x^2