Question

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

Answer 1

Answer:

$14u^{3}+4u^{2}-6u+11$

Step-by-step 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.