Question

(14x^2 + 7x) + 9x^2 =

A. 30x2
B. 30x5
C. 22x2 + 7x
D. 23x2 + 7x

Answer 1

First add the like terms.

Can you name the like terms in the expression?

Answer 2

No It's not that it's the parenthses

Answer 3

Ash, you can remove the parentheses then.

(a+b) + c = a + b + c

Answer 4

So, you can write

\((14x^2 + 7x) + 9x^2\) as \(14x^2 + 9x^2 + 7x\)

Answer 5

So the parentheses do't matter?

Answer 6

Here, the parentheses will not matter.

Answer 7

If that was multiplication instead of addition, then we wouldn't be able to remove the parantheses. But, here, we can remove them.

Answer 8

Oh okay that makes a lot more sense thank you!

Answer 9

:-) Now, you can add 14x^2 and 9x^2 as they both are like terms. And then add 7x which will give the final answer.

Answer 10

Yep :) 23x^2+7x. Right?