Question

(x-5y)(3x^2+y^2+5xy)

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Answer 1

`(x-5y)(3x^2+y^2+5xy)`

`=x(3x^2+y^2+5xy)-5y(3x^2+y^2+5xy)`

`=3x^3+xy^2+5x^2y-15x^2y-5y^3-25xy^2`

`=3x^3-5y^3-24xy^2-10x^2y`

Answer 2

\(\left(x-5y\right)\left(3x^2+y^2+5xy\right)\)

\(=3x^3+xy^2+5x^2y-15x^2y-5y^3-25xy^2\)

\(=3x^3-5y^3+xy^2-25xy^2+5x^2y-15x^2y\)

\(=3x^3-y^3-24xy^2-10x^2y\)