Question

How do you multiply `3xy(-x^4-4x^2 y+5xy^2)`?

Answer 1

`= color(blue)(-3x^5y - 12x^3.y^2 + 15x^2y^3`

Explanation:

`color(blue)(3xy)(-x^4-4x^2y+5xy^2)`
`=color(blue)(3xy) . (-x^4) + color(blue)(3xy) . (-4x^2y) + color(blue)(3xy) . (5xy^2)`

`= color(blue)(-3x^5y - 12x^3.y^2 + 15x^2y^3`