Question

计算：（-2a).(2a^2-3a+1) 3x^2.(-3xy)^2-x^2(x^2y^2-2x)

Answer 1

（-2a).(2a^2-3a+1)

=-4a^3+6a^2-2a

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

=3x^2*(9x^2y^2)-x^2(x^2y^2-2x)

=27x^4y^2-x^4y^2+2x^3

=26x^4y^2+2x^3