ragotagraceAshM ragotagraceAshM
  • 01-03-2017
  • Mathematics
contestada

Factor completely 3x^2 − 21

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baabaagreysheep
baabaagreysheep baabaagreysheep
  • 01-03-2017
The highest common factor of the two terms is 3, so that goes outside the bracket as 3(____). To get 3x^2, you multiply 3 by x^2, which is your first term in the bracket, and to get -21, you multiply 3 by -7, so your final answer is 3(x^2 - 7). I hope this helps!
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michelpantoja07 michelpantoja07
  • 01-03-2017
when factor 3 out of 3x^2-21 
you  get 3(x^2-7)

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