Question

(x^2+7x-4)+(x^2+9) I need an explanation. =]

Answer 1

First, you open the brackets.

\(\Large \color{MidnightBlue}{\Rightarrow x^2 + 7x - 4 + x^2 + 9 }\)

Do you know what like and unlike terms are?

Answer 2

Yes, I understand like and unlike terms.

Answer 3

Do you know how to operate on them?

Answer 4

No. My textbook is confusing at explaining that,

Answer 5

Okay, just tell me what all like terms are here.

Answer 6

\[x^2, x^2, and 7x. They all have X in common

Answer 7

No. Only the ones that have x^2 in common are like terms.

Answer 8

They should have the same variable and exponent.

Answer 9

Ok. I get it :)

Answer 10

Can you solve it here please, so I check it?

Answer 11

You didn't tell me how to operate on like terms, so I don't understand how.

Answer 12

Okay lol let me explain.

Answer 13

:)

Answer 14

\(\Large \color{MidnightBlue}{\Rightarrow x^2 + y + 6x^2 + 3y }\)
Just convert them all in their numerical coefficients.
\(\Large \color{MidnightBlue}{\Rightarrow 1x^2 + 1y + 6x^2 + 3y }\)
Agree?

Answer 15

Alright.

Answer 16

Now, see the like terms.
1x^2,6x^2 AND 1y,3y.
Pick up their numerical coefficients and add them.

\(\Large \color{MidnightBlue}{\Rightarrow (1 + 6)x^2 + (1 + 3)y }\)

\(\Large \color{MidnightBlue}{\Rightarrow 7x^2 + 4y }\)

Answer 17

OKay. I understand now. Thanks!!

Answer 18

Hehe, my tip ma'am?

Answer 19

Will one medal suffice?
:)

Answer 20

Haha sure

Answer 21

thanks again.