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3 January, 10:23

Simplify (4x3 + 13x - 7) - (6x2 + 9x + 2). - 2x2 + 4x - 9 - 2x2 + 22x - 5 4x3 - 6x2 + 4x - 9 4x3 - 6x2 + 22x - 5

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  1. 3 January, 10:30
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    (4x³ + 13x - 7) - (6x² + 9x + 2)

    Remember that if they don't have the same exponents/bases (x ², x³, etc.), then they cannot be grouped together.

    This means that 4x³ and 6x² will be left alone because there are no other x² or x³ in the expression.

    So first thing you do is distribute. Don't forget about that - in front of the second parentheses.

    (4x³ + 13x - 7) - (6x² + 9x + 2)

    (4x³ + 13x - 7) + (-6x² - 9x - 2)

    4x³ - 6x² + (13x - 7) + (-9x - 2)

    4x³ - 6x² + 4x ( - 7) + ( - 2)

    4x³ - 6x² + 4x - 9

    So the answer is:

    C. 4x3 - 6x2 + 4x - 9
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