Add the following expressions: p²qr + pq²r + pqr² and - 3pq²r -2pqr²

Solution:

Given, the expressions are p²qr + pq²r + pqr² and - 3pq²r -2pqr²

We have to add the expressions

On adding the expressions,

= p²qr + pq²r + pqr² + (- 3pq²r - 2pqr²)

By combining like terms,

= p²qr + pq²r - 3pq²r + pqr² - 2pqr²

By distributive property,

= p²qr + (1 - 3)pq²r + (1 - 2)pqr²

= p²qr + (-2)pq²r + (-1)pqr²

= p²qr - 2pq²r - pqr²

Therefore, the sum of the expressions is p²qr - 2pq²r - pqr².

✦ Try This: Add the following expressions: 3p²qr + 5pq²r + 7pqr² and 4pq²r -5pqr²

☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 12

NCERT Exemplar Class 7 Maths Chapter 10 Problem 57 (f)

Add the following expressions: p²qr + pq²r + pqr² and - 3pq²r -2pqr²

Summary:

On adding the expressions p²qr + pq²r + pqr² and - 3pq²r -2pqr², we get p²qr - 2pq²r - pqr²

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