Question

Factorise (p+q-r)^2-(p-q+r)^2 using identity a^2-b^2

Answer 1

Answer:(p+q-r)^2-(p-q+r)^2

=>(p+q-r+p-q+r)(p+q-r-p-q+r)

=>2p×1

=2p

Step-by-step explanation: