If a+b+c=7 and ab+bc+ca=20 find the value of a2+b2+c2

1.	If a+b+c=7 and ab+bc+ca=20 find the value of a2+b2+c2
Answer» If $a + b + c = 7$ and $a b + b c + c a = 20$ find the value of $a^{2} + b^{2} + c^{2}$

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If $a + b + c = 7$ and $a b + b c + c a = 20$ find the value of $a^{2} + b^{2} + c^{2}$

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