Math, asked by Ruder, 1 year ago

If a²+b²+c²=20 and ab+ba+ca=8 find the value of a+b+c

Answers

Answered by Anonymous
0
Hey !!!!!

Here is your answer



(a+b+c)2 = a2 +b2 + c2 + 2(ab+bc + ca)
(a+b+c)2 = 20+ 2*8
= 20+16
= 36

So

(a+b+c)2 = 36
so
a + b + c = √36 = 6

Plz mark it brainliest ☺
Answered by abhi569
1
Hey


(a+b+c) ²=a²+b²+c²+2(ab+bc+ca)

(a+b+c) ²=20+2(8)

(a+b+c)²=20+16=36

(a+b+c)²=36

(a+b+c) =√36

(a+b+c) =6
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