Question

if a+b+c =9 and ab+bc+ca =26, finda²+b²+c².​

Answer 1

Answer:

29

Step-by-step explanation:

a+b+c=9

Square both sides

(a+b+c)²=(9)²

a²+b²+c²+2ab+2bc+2ca=81

a²+b²+c²+2(ab+bc+ca)=81

a²+b²+c²=81-2(26)

a²+b²+c²=81-52

a²+b²+c²=29

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Answer 2

Step-by-step explanation:

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