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18 May, 10:35

49-2ax - a^2-x^2 factor

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  1. 18 May, 13:02
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    49-2ax - a^2-x^2

    Extract the negative sign

    = 49 - (a^2 + 2ax + x^2)

    Factor using a^2 + 2ab + b^2 = (a+b) ^2

    = 49 - (a+x) ^2

    Factor using a^2 - b^2 = (a-b) (a+b)

    = (7 - (a + x)) * (7 + (a + x))

    = (7 - a - x) * (7 + a + x)
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