Question

factorize 20-45(m+n)^2​

Answer 1

Answer:

5(2-3m-3n)(2+3m+3n)

Step-by-step explanation:

factor out 5 from expression and then use a^2-b^2 =(a-b)(a+b) formula

Answer 2

Answer:

20 - 45(m + n)

=20(m+n)-45(m+n) =20m+20n-45m-45n

=20m-45m+20n-45n

= -25m-25n

- 25m - 25n = 0

25(- m - n) = 0

- 25(m + n) = 0

m + n = 0

m = 0 or n=0