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10 November, 08:26

What is the missing term?

(10 х - 4 х2) - (7 х + ?) = 3 х - 6 х2

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  1. 10 November, 12:00
    0
    (10 х - 4 х2) - (7 х + ?) = 3 х - 6 х2

    10x - 7x = 3x which is given,

    Now you have - 4x^2 - ? needs to equal - 6x^2

    write it as an equation:

    -4x^2 - ? = - 6x^2

    To solve for? add 4x^2 to each side:

    -? = - 2x^2

    Multiply each side by - 1:

    ? = 2x^2
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