anonymous
  • anonymous
What are steps for completing the square?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
what
anonymous
  • anonymous
square root?
Homeworksucks
  • Homeworksucks
\[1. ax ^{2}+bx=c\] Step 2- take b, divide it by 2, and square that, and add it to both sides of the equation.

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Homeworksucks
  • Homeworksucks
\[ax ^{2}+bx+(\frac{ b }{ 2 })^{2}=c+(\frac{ b }{ 2 })^{2}\]
Homeworksucks
  • Homeworksucks
then take the square root of both sides, (ignore that little drawing please) and solve from there
Homeworksucks
  • Homeworksucks
You should have a nice equation by now and be able to figure out the two solutions.
anonymous
  • anonymous
My equation is 3x^2-4x-8=0
Homeworksucks
  • Homeworksucks
ok, so you would have \[3x ^{2}-4x=8\] first
anonymous
  • anonymous
I already have the answer and it all worked out I just need it explained a little more
Homeworksucks
  • Homeworksucks
and then \[3x ^{2}-4x+(\frac{ 4 }{ 2})^{2}=8+(\frac{ 4 }{ 2})^{2}\]
Homeworksucks
  • Homeworksucks
we divide by 2, because in a perfect square trinomial, its a^2+2ab+b^2, and to find ab, you would divide by 2, and then square, to ensure that everything works out cleanly on both sides when you square root
Homeworksucks
  • Homeworksucks
|dw:1378860824949:dw|
Homeworksucks
  • Homeworksucks
|dw:1378860876764:dw|, i divided by 3 in order to get x^2 all by itself without a coefficient
Homeworksucks
  • Homeworksucks
|dw:1378861058934:dw|, sorry
anonymous
  • anonymous
I think I've figured out what I didn't know! Thank oyu (:
Homeworksucks
  • Homeworksucks
No problem

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