Add :3p2q2 – 4pq + 5, – 10 p2q2 , 15 + 9pq + 7p2q2

Dear Student

When term have the same algebraic factors, they are like terms.
Then, we have to add the like terms
= 3p²q² –4pq + 5 + (- 10p²q²) + 15 + 9pq + 7p²q²
= 3p²q² –10p²q² + 7p²q² –4pq + 9pq + 5 + 15
= p²q² (3 -10 + 7) + pq (-4 + 9) + (5 + 15)
= p²q² (0) + pq (5) + 20
= 5pq + 20
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Thanks