Question

if a^2+b^2+c^2=280 and ab+bc+ca=19/2 find (a+b+c)^3

Answer 1

Refer The Attachment ⬆️

• $\longmapsto\;{\bold{5170.193}}$

Note:- Actually you give ab+bc+ca = 19/2, it might be a printing mistake of "9/2", If it's 9/2 substitute it in the place of 19/2.. The answer will be 17³ = 4913.

$\tt{@MrMonarque}$

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