Question

if a b + BC + CA is equal to 36 and a square + b square + c square equal to 85 then find a + b + c

Answer 1

Heya!!!
Here is the answer.

Answer 2

(a+b+c) ^2 =a^2+b^2+c^2 +2(ab+bc+ca)
=85+2*36
=157
a+b+c=(157)^0.5
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