Question

What should be taken away from p2–q2+ 2pq + 10 to obtain –2p2–2q2+ 7pq + 10?

(pls show steps)and calculations

Answer 1

subtracting some value from p²-q²+2pq+10 , so as to obtain -2p²-2q²+7pq+10

Assuming unknown value 'x' and solving the equation we get , 3p²+q²-5pq

Answer 2

Answer:

p²-q²+2pq+10

-2pq-2q²+7pq+10

(+) (+) (-) (+)

Ans= 3p²+q²-5pq+0