Question

1.如果2xy^2×A=6x^2y^2－4x^3y^2,则多项式A为

Answer 1

1.两边除以2xy^2 A=3x-2x^2

2.27x^6-7x^6+7x^4(4x^2+1)

=20x^6+28x^6+7x^4

=x^4*(48x^2+7)