anonymous
  • anonymous
Algebra 1 help
Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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anonymous
  • anonymous
|dw:1363018027305:dw|
anonymous
  • anonymous
ists 2x squared and 5x squared
phi
  • phi
you can use ^ to show exponents -14+2x^2 -3x + 5x^2 + 6-6x better use the equation editor \[ -14+2x^2 -3x + 5x^2 + 6-6x \]

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phi
  • phi
when adding you can change the order so you could write it like this \[ 5x^2 + 2x^2 -3x-6x-14+6 \]
phi
  • phi
it should be clear what -14+6 is for the x^2 terms: if you have 5 x^2 terms and add 2 more x^2 terms, how many x^2 terms do you have ?
anonymous
  • anonymous
-8
anonymous
  • anonymous
and \[x ^{2}\]
phi
  • phi
if you have 5 x^2 terms and add 2 more x^2 terms, how many x^2 terms do you have ?
phi
  • phi
if you think of x^2 as a "thing" and you have 5 of them and add 2 more, how many do you have ?
anonymous
  • anonymous
7 x \[7x ^{2}\]
phi
  • phi
yes 7 x^2 so far you have \[ 7x^2 -3x-6x-8 \] now how many of the x's
anonymous
  • anonymous
2 x's because 3x and 6x right
phi
  • phi
it is -3x -6x we could "factor out" the x to get (-3-6) x now what is -3-6 ?
anonymous
  • anonymous
3
anonymous
  • anonymous
is the 6 a negative too
anonymous
  • anonymous
if the six is negative it be -9 right
phi
  • phi
yes -3-6 is -9 so the answer is -9x the whole answer is \[ 7x^2 -9x-8 \] if negative numbers are unclear, see http://www.khanacademy.org/math/arithmetic/absolute-value/adding_subtracting_negatives/v/negative-numbers-introduction
anonymous
  • anonymous
Thank you

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