Question

Can someone please check my answer to this equation?
|-4b - 8 | + |-1 - b^2 | + 2b^3 ; b = -2

the answer I got is 69, is this correct?

Answer 1

nope, not quite, lets break it down step by step

Answer 2

ok I'm ready

Answer 3

|-4b - 8 | = ?

Answer 4

dont you have to plug -2 into b first?

Answer 5

yeah, what do you get when you do that?

Answer 6

16

Answer 7

0 sorry

Answer 8

actually, yes, 0

Answer 9

lol i thought so

Answer 10

|-4b - 8 | = |8-8| = 0

Answer 11

|-1 - b^2 | = ?

Answer 12

i got -5

Answer 13

almost, remember that the absolute value sign means that you remove the negative sign at the end

|-1-b^2| = |-1-4| = |-5| = 5, with me so far?

Answer 14

yes

Answer 15

last step, find 2b^3 (be careful with signs!)

Answer 16

is it -64?

Answer 17

yup!

now all that's left is 5 - 64 = your answer

Answer 18

-59

Answer 19

good! that's it.

Answer 20

thank you :)! @Vocaloid