Question

(-x-4y)(5x-7y) Simplify the algebraic expression

Answer 1

Answer:

(-x-4y)(5x-7y)

using binomial multiplication indentity

(-x)(5x-7y)- 4y(5x-7y)

-5x^2+ 7xy- 20xy+ 28y^2

-5x^2 -13xy+28y^2

Answer 2

$\huge\tt\colorbox{lightgreen}{Answer}$

Answer :

$- 5 {x}^{2} - 13xy + 28 {y}^{2}$