If a²+b²+c²=20 and ab+ba+ca=8 find the value of a+b+c
Answers
Answered by
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 ☺
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
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
(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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