anonymous
  • anonymous
Explain, in your own words, the step-by-step process to simplifying the expression below. Include the simplified answer in your explanation. (6x2 − 5) − (3x2 + x + 7)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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welshfella
  • welshfella
the first thing you do is remove the 2 parentheses removing the first one makes no difference to the contents. But removing the second one does. You have to distribute the negative over the contents of the second one. Its like multiplying the contents by -1. so we have (6x2 − 5) − (3x2 + x + 7) = 6x^2 - 5 -3x^2 -x - 7 Note that -1 * x = -x and -1*+7 = -7
welshfella
  • welshfella
Now you simplify like terms to do this you can bring the like terms together (though this is not essential) 6x^2 - 5 -3x^2 -x - 7 = 6x^2 - 3x^2 - x - 5 - 7 = 3x^2 - x - 12
welshfella
  • welshfella
what is left is called a trinomial or a quadratic which can sometimes be factored . This one cannot be factored.

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welshfella
  • welshfella
So this is the simplified form.
anonymous
  • anonymous
So the simplified form is 3x^2-x-12?
welshfella
  • welshfella
yes
anonymous
  • anonymous
Thank you
welshfella
  • welshfella
yw

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