If a+b+c=9andab+bc+ca=26find a²+b²+c²
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29..............................
shaikreshma15:
how
Answered by
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your ans
apply the formula
(a+b+c)2=a2+b2+c2+2(Ab+BC+CA)
(9)2=a2+b2+c2+2(26)
81=a2+b2+c2+52
81-52=a2+b2+c2
29=a2+b2+c2
apply the formula
(a+b+c)2=a2+b2+c2+2(Ab+BC+CA)
(9)2=a2+b2+c2+2(26)
81=a2+b2+c2+52
81-52=a2+b2+c2
29=a2+b2+c2
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