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18 July, 18:41

Show why this statement is true: the square root of four times nine equals the square root of four times the square root of nine

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  1. 18 July, 20:42
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    √ (4*9) = √ 36 = 6

    now the √4 = 2

    and √9 = 3

    so 2*3 = 6

    therefore √ (4*9) = √4 * √9

    that's a law of surd

    generally √ab = √a * √b
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