Question

Factorise each of the following: (2a+3b)² – 25c² using identites​

Answer 1

(2a +3b ) ^2 - 25c^2 ( It is the form of a^2 -b^2 )

=(2a +3b ) ^2 -( 5c ) ^2

=( 2a + 3b + 5c ) ( 2a + 3b - 5c )