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15 April, 17:55

Solve 2v^2-90=0, where v is a real number

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  1. 15 April, 21:24
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    First thing you want to do is put v by itself

    Add 90 to both sides

    2v^2 = 90

    Divide by 2 on both sides

    v^2 = 45

    And then take the sqrt (45)

    v = sqrt (45)

    We can reduce this by finding the perfect square which is 9

    v = sqrt (9) * sqrt (5)

    So,

    v = 3 * sqrt (5)
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