Question

If we add, 7xy + 5yz – 3zx, 4yz + 9zx – 4y and -3xz + 5x – 2xy, then the answer is:

Answer 1

Given:

• First expression: 7xy + 5yz - 3xz
• Second expression: 4yz + 9xz - 4y
• Third expression: -3xz + 5x - 2xy

What to do?

We have to add the above three expressions to find the sum.

How to do?

First we have to remove the brackets, next rearrange the like terms and then solve those like terms to get the sum.

Solution:

(7xy + 5yz - 3xz) + (4yz + 9xz - 4y) + (-3xz + 5x - 2xy)

Remove the brackets,

⇒ 7xy + 5yz - 3xz + 4yz + 9xz - 4y - 3xz + 5x - 2xy

Rearrange the like terms,

⇒ 7xy - 2xy + 5yz + 4yz - 3xz + 9xz - 3xz - 4y + 5x

Solve the like terms,

⇒ 5xy + 9yz + 3xz - 4y + 5x

∴ Hence, the sum is 5xy + 9yz + 3xz - 4y + 5x.

Answer 2

Answer:

5xy + 9yz + 3xz - 4y + 5x.