anonymous
  • anonymous
How do you solve 5x² - 20x² (GCF)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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AravindG
  • AravindG
GCF means?
AravindG
  • AravindG
-15x^2
anonymous
  • anonymous
GCF means Greatest Common Factor.

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anonymous
  • anonymous
Am I right?
AravindG
  • AravindG
@allea_marie reply pls
anonymous
  • anonymous
Hello?
anonymous
  • anonymous
There needs to be more here, for there to be something to solve.
anonymous
  • anonymous
Yes it stands for Greatest Common Factor
anonymous
  • anonymous
so what are the two numbers that you want to find the greatest common factor of?
anonymous
  • anonymous
But why do you need GCF to solve this? It is quite simple. Just subtract 5-20 and carry over the x^2. That would be -15x^2
anonymous
  • anonymous
Okay thanks, how would you solve 2x² - 21x=54
anonymous
  • anonymous
that one can be solved by factorising the polynomial.
anonymous
  • anonymous
\[ 2x^2 - 21x =54 \] \[2x^2 - 21x - 54 = 0 \] Now you want to solve: \[(2x + a)(x +b) = 2x^2 - 21x - 54 \] Note that you must have \[ a*b = -54 \]
anonymous
  • anonymous
this won't always work so easily. But I can see here that it does.
anonymous
  • anonymous
Okay thank you

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