Question

-3a2 - b3 + 3c2 - 2b3 if a = 2, b = -1, and c = 3

Answer 1

Are you simplifying?

Answer 2

solving

Answer 3

Solving for what? I mean, they already give you a, b, and c

Answer 4

then yeah simplifying

Answer 5

So for a you plug in a, b you plug in b, and c you plug in c. What will that look like?

Answer 6

-3(2)^2 - (-1)^3...

Answer 7

yeah then its -3 x 2?

Answer 8

You're going to do the exponents first. So 2^2, then multiply that by -3

Answer 9

-12

Answer 10

Yeah, so that's the first term. How about the second?

Answer 11

-1

Answer 12

It's actually going to be +1

Answer 13

Because yes, you're right, -1^3 is -1, but there's a subtraction sign that makes it positive

Answer 14

so the answer is -11

Answer 15

Have you done the work for all of the terms?

Answer 16

not yet

Answer 17

-12-1+18-2

Answer 18

Yeah, right, so then you just finish simplifying that

Answer 19

5

Answer 20

Alright, there you go

Answer 21

thanks

Answer 22

You're very welcome