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If ab + bc + ca = 36

a^2 + b^2 + c^2 = 85

Find a + b + c.

## Answers

Answered by

8

according to your question

(a+b+c)^2= (a^2+b^2+c^2)+2(ab+bc+ca)

putting the above values

=(85)+2(36)

=85+7

(a+b+c)^2=157

a+b+c=√157

(a+b+c)^2= (a^2+b^2+c^2)+2(ab+bc+ca)

putting the above values

=(85)+2(36)

=85+7

(a+b+c)^2=157

a+b+c=√157

FanishRedcliff:
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