Question

2. (3r^2 + 7r + 1) + (4r^2 - 8r - 2)

a) 7r^2 + 15r -1
b) 7r2 - r - 1
c) 7r^2 - 15r - 3
d) -r^2 - r - 1

Answer 1

Try doing it the way we did it last time.

Answer 2

ok

Answer 3

3r^2+7r+1+4r^2-8r-2

Answer 4

Hey @becca1 what do you think we do first?

Answer 5

Yes, now simplify.

Answer 6

um explain plz

Answer 7

Do you know what like terms are?

Answer 8

no

Answer 9

Like terms are terms that have the same variables and powers. This means...

3r^2 and 4r^2 are like terms
7r and -8r are like terms
1 and -2 are like terms

You understand?

Answer 10

yes

Answer 11

Okay. Can you now perform the operations on the like terms?

Answer 12

hey becca help me , with my scicene

Answer 13

7r^2
-1r or -r
dont know the last one

Answer 14

Good, but you need to put them together.
3r^2+7r+1+4r^2-8r-2
= 7r^2 - r - 1

Answer 15

so b

Answer 16

Yes

Answer 17

did u get my mesg. if so i can help in math wiht u?

Answer 18

can you help me with another one

Answer 19

@a1234

Answer 20

i cuold. did u get my emssahe

Answer 21

im not aloud to @faefe

Answer 22

I actually need to go now.

Answer 23

just messahe me it, i will get yu in A

Answer 24

oh ok bye

Answer 25

beca im here.

Answer 26

u can do it, i will ggive u an aA

Answer 27

@faefe is it in science 8a or b

Answer 28

in math, language arts annyhing.

Answer 29

8b

Answer 30

u here?

Answer 31

@becca1

Answer 32

is this sciecne 8 b for 8grade

Answer 33

? ? ? ?

Answer 34

yes

Answer 35

can u give me ur lgoin i will just look for one minute