Question

only (xiv) part please fast

Answer 1

= (p^2 - 4p)^2 -16(p^2 - 4p)- q(p^2 -4p)+16p^2q - 64pq

=(p^2 - 4p)^2 -16(p^2 - 4p) - qp^2 +4pq+16p^2q-64pq

=(p^2 - 4p)^2 -16(p^2 - 4p) +15p^2q -60pq

=(p^2 - 4p)^2 -16(p^2 - 4p) +15q(p^2 - 4p)


let (p^2 - 4p) = w

= w^2 -16w +15qw

=w(w - 16 + 15q)

now put value of w =(p^2 -4p)

=(p^2 - 4p){p^2 -4p -16 +15q}