Question

Simplify the sum. (7u3 + 4u2 + 7) + (7u3 – 6u + 4)

Answer 1

`14u^(3)+4u^(2)-6u+11`

Explanation:

The question is to simplify
`(7u^(3)+4u^(2)+7)+(7u^(3)-6u+4)`

We combine like terms, as in, combine cubes with cubes, squares with squares, numbers with numbers and so on.

• There are 2 cubed terms, so they should be combined.
• There are 2 numbers, so they should be combined.
• Others, leave as is.

So we have:

`(7u^(3)+4u^(2)+7)+(7u^(3)-6u+4)\\(7u^3+7u^(3))+4u^(2)-6u+(7+4)\\14u^(3)+4u^(2)-6u+11`

This is the simplified form of the sum given.