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10 March, 10:57

2x^2=x+6

Solving quadratics by factoring

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  1. 10 March, 13:27
    0
    x = - 3/2 or + 2

    Step-by-step explanation:

    Write in standard form:

    2x^2 - x - 6 = 0

    Find factors of 2 (-6), the product of the first and last coefficients, that have a sum of - 1, the middle coefficient.

    -12 = - 4·3

    Split the middle term using those factors:

    2x^2 - 4x + 3x - 6 = 0

    Factor the pairs of terms:

    2x (x - 2) + 3 (x - 2) = 0

    (2x + 3) (x - 2) = 0

    Use the zero product rule to identify solutions.

    2x + 3 = 0 ⇒ x = - 3/2

    x - 2 = 0 ⇒ x = 2
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