Question

$(x + 3y)(y - 3x)$

Answer 1

Hello friend
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Thanks for your question...

let's solve

=) In example

=) ( x + 3y ) ( y - 3x )

=) x ( y - 3x ) + 3y ( y - 3x )

=) xy - 3x^2 + 3y^2 - 9xy

=) -3x^2 - 8xy + 3y^2 ◀◀. Ans..

I hope this will helps you.

keep asking.

Thanks.