If a^2 + b^2 +c^2 = 20 and a + b + c = 0 find ab + bc + ac​

Question

If a^2 + b^2 +c^2 = 20 and a + b + c = 0 find ab + bc + ac​

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Jade 1 month 2021-08-21T14:02:55+00:00 1 Answer 0 views 0

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    2021-08-21T14:04:12+00:00

    ANSWER

    ( a+ b + c) 2 = a2 + b2 + c2 + 2 ( ab + bc + ac)

    ab + bc + ac = –20 / 2 = -10

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