Question

factorise (p+q)^2-81

Answer 1

MERY CHRISTMAS

P^2+q^2+2pq-81

I hope it will help u

Answer 2

( p + q)^2 - 81

= ( p + q)^2 -(9)^2

= ( p + q +9 ) ( p + q -9 )

Using identity ,

( a)^2 - (b)^2 = ( a +b)(a -b)