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4 March, 11:51

What is 4x (5x-2) = 20x-2

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  1. 4 March, 13:34
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    Answer: x = 1.32 and x = 0.076

    Step-by-step explanation:

    4x (5x-2) = 20x-2

    20x^2-8x = 20x-2

    20x^2-8x-20x+2=0

    20x^2-28x+2=0

    Using quadratic equation

    x = (-b + or - √ (b^2-4ac)) / 2a

    a = 20, b=28, c = 2

    Substitute into the equation

    x = (7+√39) / 10. = 1.32

    x = (7-√39) / 10 = 0.076
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