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20 March, 14:29

Simplify 18 - 2[x + (x - 5) ].

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  1. 20 March, 17:19
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    First, distribute what's inside the parenthesis, and change all the subtractions to addition of negatives.

    18 + - 2 (x^2 + - 5x)

    Next distribute the - 2

    18 + - 2x^2 + 10x

    Then I like to rearrange stuff to put it in standard form.

    -2x^2 + 10x + 18
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