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19 February, 22:28

It is given that a+b=6 and ab=7. Find the value of a^2 + b^2.

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  1. 19 February, 22:42
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    Use the identity:-

    a^2 + b^2 = (a + b) ^2 - 2ab

    Plugging in the given values; -

    a^2 + b^2 = 6^2 - 2*7 = 36-14 = 22 Answer
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