Find $: a^{2}+b^{2}+c^{2},$ if $a+b+c=9$ and$a b+b c+c a=24$ – InterviewSolution

1.	Find $: a^{2}+b^{2}+c^{2},$ if $a+b+c=9$ and$a b+b c+c a=24$
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