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15 July, 21:14

Justify each step of the proof.

Conjecture: If 2 (x^2+5) = 60, then x is 5 or - 5

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  1. 15 July, 21:45
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    X is 5 and negative 5.

    2 (x^2+5) = 60

    Divide both sides by 2

    X^2+5=30

    Subtract 5 on both sides

    X^2=25

    The square route of 25 is 5 or - 5.
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