Question

if a+b+c=15, ab+bc+ca= 60 then find the value of a2 + c2 + b2​

Answer 1

Now, a² + b² + c²

= ( a + b + c )² - 2 ( ab + bc + ca )

= 15² - 2 ( 60 )

= 225 - 120

= 105

Hope it helps! (:

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