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29 January, 23:19

H²+10h=-21 solve quadratic trinomials

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  1. 30 January, 03:01
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    H²+10h+21 = 0

    h²+3h+7h+21 = 0

    h (h+3) + 7 (h+3) = 0

    (h+3) (h+7) = 0

    h+3=0

    h = - 3

    h+7=0

    h=-7
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