Question

Factorise the expression: am^2 + bm^2 + bn^2+an^2​

Answer 1

( a+b) ( m^2 + n^2)

Explanation:

factorise like terms

m^2 ( a + b ) + n^2 ( m^2 + n^2)

then put like terms together put remaining terms in a bracket

( a + b) ( m^2 + n^2 )