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23 June, 23:06

Prove that the value of the expression: (125^2+25^2) (5^2-1) is divisible by 39

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  1. 24 June, 02:43
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    (1252+252) (52-1)

    = (1252+252) (52+-1)

    = (1252) (52) + (1252) (-1) + (252) (52) + (252) (-1)

    =390625-15625+15625-625

    =390000

    divide by 39 is

    =10000
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