anonymous
  • anonymous
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?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Vocaloid
  • Vocaloid
nope, not quite, lets break it down step by step
anonymous
  • anonymous
ok I'm ready
Vocaloid
  • Vocaloid
|-4b - 8 | = ?

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More answers

anonymous
  • anonymous
dont you have to plug -2 into b first?
Vocaloid
  • Vocaloid
yeah, what do you get when you do that?
anonymous
  • anonymous
16
anonymous
  • anonymous
0 sorry
Vocaloid
  • Vocaloid
actually, yes, 0
anonymous
  • anonymous
lol i thought so
Vocaloid
  • Vocaloid
|-4b - 8 | = |8-8| = 0
Vocaloid
  • Vocaloid
|-1 - b^2 | = ?
anonymous
  • anonymous
i got -5
Vocaloid
  • Vocaloid
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?
anonymous
  • anonymous
yes
Vocaloid
  • Vocaloid
last step, find 2b^3 (be careful with signs!)
anonymous
  • anonymous
is it -64?
Vocaloid
  • Vocaloid
yup! now all that's left is 5 - 64 = your answer
anonymous
  • anonymous
-59
Vocaloid
  • Vocaloid
good! that's it.
anonymous
  • anonymous
thank you :)! @Vocaloid

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