Math, asked by mohdnurain7612, 5 months ago

If ab + bc + ca = 9 and a² + b² + c² = 31, the value of a + b + c is

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Answered by james7483

0

Answer:

(a+b+c)² = a²+b²+c²+ab+bc+ca

= 31 + 9

= 40

a+b+c = √40

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