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30 October, 16:47

Which polynomial identity will prove 49-5=45

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  1. 30 October, 17:05
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    49 - 4 = 45

    7² - 2² = 45

    a² - b² = (a + b) (a - b) - difference of squares

    (7 - 2) · (7 + 2) = 45

    5 · 9 = 45

    45 = 45

    Answer: A) Difference of Squares
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