anonymous
  • anonymous
if a=-2 and b= -2, what is the value of (a^3-1) /(b-1)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Luigi0210
  • Luigi0210
\[\frac{ a^3-1 }{ b-1 }\] Is this your equation?
anonymous
  • anonymous
yes
Luigi0210
  • Luigi0210
well plug in 2 and solve ^_^

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More answers

anonymous
  • anonymous
Unfortunately we cannot give out answers, so where do you run into a problem stephanie?
Nurali
  • Nurali
\[\frac{ (-2)^3-1 }{ -2-1 }\]
Luigi0210
  • Luigi0210
since it's a a negative and cubed.. it'll be a negative
Nurali
  • Nurali
\[\frac{ -8-1 }{ -3 }\]
Luigi0210
  • Luigi0210
Like Nurali has shown :l
Nurali
  • Nurali
\[\frac{ 9 }{ 3 }\]
Luigi0210
  • Luigi0210
which simplifies to 3.. unless I've completely lost my math skills
Nurali
  • Nurali
3
anonymous
  • anonymous
were we plug in for (-2) ^3, why is it not -6
Luigi0210
  • Luigi0210
cause it's -2*-2*-2
Luigi0210
  • Luigi0210
a^2=a*a a^3=a*a*a a^4=a*a*a*a etc..
Luigi0210
  • Luigi0210
and a^0=1
anonymous
  • anonymous
oh, I see. I was doing something wrong, thanks ^^
Luigi0210
  • Luigi0210
Np
Luigi0210
  • Luigi0210
:P

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