Question

How do you find the product of `(-m+5n)(-m-5n)`?

Answer 1

`m^2-25n^2`

Explanation:

`(-m+5n)(-m-5n)=(-m)(-m)-m(-5n)+5n(-m)+5n(-5n)=m^2+5mn-5mn-25n^2=m^2-25n^2`