If a^2+ b^2+ c^2 = 35 and AB + BC + CA = 23 Find a + b + c
Answers
Answered by
1
Step-by-step explanation:
We know,
(a+b+c)
2
=a
2
+b
2
+c
2
+2ab+2bc+2ca
Given,
a
2
+b
2
+c
2
=35 and
ab+bc+ca=23
Therefore,
=>(a+b+c)
2
=35+2(23)
=>(a+b+c)
2
=35+46
=>(a+b+c)
2
=81
=>(a+b+c)=
81
=>(a+b+c)=±9
Answered by
1
Step-by-step explanation:
If A2 + B2 + C2 = 35 and Ab + Bc + Ca = 23; Find a + B + C.
Similar questions