Question

DETERMINE THE SQUARE OF p-3q-5r​

Answer 1

Answer:

Step-by-step explanation:

$(p-3q-5r)^{2}$ = (p-3q-5r)(p-3q-5r)

= p ( p-3q-5r) - 3q(p-3q-5r) - 5r(p-3q-5r)

= $p^{2} -3pq - 5pr -3pq +9q^{2} -5$pr  +15qr +25$r^{2}$

= $p^{2} +9q^{2} + 25r^{2} -6pq -10pr - 30 qr$