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11 August, 06:21

Atraeus is solving the quadratic equation by completing the square. 7x^2 - 14x + 6 = 0 7x2 - 14x = - 6 A (x^2 - 2x) = - 6What is the value of A?

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  1. 11 August, 06:48
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    So we first minus 6 both sides

    7x^2-14x=-6

    then we have

    A (x^2-2x) = - 6

    what is A?

    hmm (this should be painfully obvous, but if not, here are steps)

    7x^2-14x=-6

    A (x^2-2x) = - 6

    7x^2-14x=-6=A (x^2-2x)

    7x^2-14x=A (x^2-2x)

    undistribute 7

    7 (x^2-2x) = A (x^2-2x)

    divide both sides by (x^2-2x)

    7=A

    A=7
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