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16 February, 22:45

Astudent says that if 5x^2=20 then x must be equal to 2. Do you agree or disagree with the student? Justify your answer

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  1. 16 February, 22:56
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    disagree, x = 2 or - 2

    Step-by-step explanation:

    5x^2 = 20

    Divide each side by 5

    5x^2/5 = 20/5

    x^2 = 4

    Take the square root of each side

    sqrt (x^2) = ±sqrt (4)

    x = ±2

    X could be either 2 or - 2
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