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anonymous

  • one year ago

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)

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  1. welshfella
    • one year ago
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    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

  2. welshfella
    • one year ago
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    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

  3. welshfella
    • one year ago
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    what is left is called a trinomial or a quadratic which can sometimes be factored . This one cannot be factored.

  4. welshfella
    • one year ago
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    So this is the simplified form.

  5. anonymous
    • one year ago
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    So the simplified form is 3x^2-x-12?

  6. welshfella
    • one year ago
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    yes

  7. anonymous
    • one year ago
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    Thank you

  8. welshfella
    • one year ago
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    yw

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