if a + b + c = 9 and AB+ BC + CA = 26 find a^2+ b ^2+ c^2
Answers
Answered by
4
Step-by-step explanation:
put the formula
(a+b+c)^2
expand it lhs will be equals to 81 (square of 9)
rhs will be ur extended formula
and then solve it.
Answered by
4
Hii
you are welcome in my ans
(a + b + c)^2 - 2 ( ab + bc + ca) = a^2 + b^2 + c^2
a^2 + b^2 + c^2 = 81 - 52
a^2 + b ^2 + c^2 = 29
__/\__☺️
Hope my ans helps you✌️✊
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