Question

Add the following:-
i) 3p^2q^2-4pq+5,-10p^2q^2,15+9pq+7p^2q^2.
ii) x^2-y^2-1,y^2-1-x^2,1-x^2-y^2. please answer with explanation.​

Answer 1

Answer:

Hey mate,here is ur answer

Step-by-step explanation:

i)(3p2q2 - 4pq + 5) + (-10 p2q2) + (15 + 9pq + 7p2q2)

= 3p2q2 - 4pq + 5 - 10 p2q2 + 15 + 9pq + 7p2q2

= 3p2q2 - 10 p2q2 + 7p2q2 - 4pq + 9pq + 5 + 15

= p2q2 (3 - 10 + 7) + pq (-4 + 9) + 5 + 15

= 5pq + 20

ii)(x2 - y2 - 1) + (y2 - 1 - x2) + (1 - x2 - y2)

= x2 - y2 - 1 + y2 - 1 - x2 + 1 - x2 - y2

= x2 - x2 - x2 − y2 + y2 - y2 - 1 - 1 + 1

= x2(1 - 1 - 1) + y2 (-1 + 1 - 1) + (- 1 - 1 + 1)

= -x2 - y2 - 1

hope it helps you,plz mark me as brainliest