Question

Fan & Medal...

What is the value of -2x^3+5x-7, when x=-3

A. 22

B. 32

C. 36

D. 46

Answer 1

D is supposed to be 40 not 46 sorry

Answer 2

Just plug in -3 in place of x.

-2(-3)^3+5(-3)-7=?

Answer 3

so...

6^3+2-7=

216+(-5)=

211 ?

Answer 4

That's what I did before, but that isn't an option

Answer 5

Not exactly. -2(-3)^3 isn't 216. You first do -3^3 and then multiply by -2.

Answer 6

so -27(-2)

Answer 7

which is 54

Answer 8

Yes

Answer 9

is that it? it isn't an answer

Answer 10

No, it's 54+(-5)

Answer 11

ok so that's -10.8

Answer 12

Wait, you made another mistake 5(-3) doesn't equal 2. It means 5*-3 which is -15. That means that the equation was supposed to be 54-15-7

Answer 13

Simplify that and you'll have your answer

Answer 14

32

Answer 15

Thanks a lot :)

Answer 16

You're welcome