Question

Can someone please explain this one to me? Evaluate the following expression using the values given:

Find −3a2 − b3 + 3c2 − 2b3 if a = 2, b = −1, and c = 3.

Answer 1

have u tried subtraction

Answer 2

wait

Answer 3

I have attempted to solve this problem but every time I try I get different answers :p

Answer 4

I just need it explained.

Answer 5

start with 3*1*2

Answer 6

- 1*3

Answer 7

replace the varibles

Answer 8

firt write a and b and replace them with 1 and 3 try that

Answer 9

does thta help

Answer 10

I tried all of that, one sec ill do it again and you tell me if my answer is correct.

Answer 11

okay

Answer 12

I got 9 as my answer.

Answer 13

yea thats right

Answer 14

really? yay thanks, mind if you help me with one more?

Answer 15

sure

Answer 16

one sec

Answer 17

hey hold i will be back

Answer 18

can you paste on this or no? i cant seem to paste my question...

Answer 19

Never mind I got it. Find x3 − 2y2 − 3x3 + z4 if x = 3, y = 5, and z = −3.

Answer 20

I will do it just tell me if I am right.

Answer 21

okay

Answer 22

I got 521 but thats not any of the answer choices..

Answer 23

You there?

Answer 24

yea sorry thats right

Answer 25

how is it right? its not any of the answer choices...

Answer 26

thats wierd whats are the choicesz

Answer 27

-185, -77, -23, 85

Answer 28

oh 85 sorry its a positive where did u get the other answer you replace them then keept them as a positive

Answer 29

what do you mean where did i get the other answer?

Answer 30

yeah.. i got the ones you helped me with wrong