ccastudentgrade10
  • ccastudentgrade10
PLEASE HELP ME |-4b - 8| + |-1 - b^2| + 2b^3; b = -2 please explain steps?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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BunnyKitten02
  • BunnyKitten02
i ca t really help you but if you go to brainly.com they can help, thats were my sister got her answer and her quesion was pretty close to this
ccastudentgrade10
  • ccastudentgrade10
okay ill try that
anonymous
  • anonymous
substitute -2 for every b. Take it one piece at a time. Do you know how to do this part |-4(-2) - 8| =

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ccastudentgrade10
  • ccastudentgrade10
why do you substitute -2 for every b? (i have to explain my steps) @peachpi
ccastudentgrade10
  • ccastudentgrade10
oh wait duh it makes so much sense now! but how do i work in the absolute value? do i just ignore it?
anonymous
  • anonymous
sub the 2 because that's what they're asking you to do. don't ignore the absolute value signs. Make what you end up with positive, then drop them.
anonymous
  • anonymous
|-4(-2) - 8| = |8 - 8| = |0| = 0
ccastudentgrade10
  • ccastudentgrade10
ohhhh okay thank you!!
anonymous
  • anonymous
try this part |-1 - b^2|
ccastudentgrade10
  • ccastudentgrade10
so it would be |-1 - (-2)^2 |-1 - -4| |-1 + 4| |3| =3
ccastudentgrade10
  • ccastudentgrade10
@peachpi
ccastudentgrade10
  • ccastudentgrade10
for that part
anonymous
  • anonymous
close. When you do (-2)² you get should have gotten 4 because a negative times a negative is a positive
ccastudentgrade10
  • ccastudentgrade10
oh right! okay thank you! when i get my answer ill type it here
anonymous
  • anonymous
ok
ccastudentgrade10
  • ccastudentgrade10
is it -11? @peachpi
anonymous
  • anonymous
yes -11
ccastudentgrade10
  • ccastudentgrade10
thank you!
anonymous
  • anonymous
you're welcome

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