Question

if a+b+c=9, ab+bc+ca=36then a
square+b square+c square

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Answer 1

Answer:

9

Step-by-step explanation:

(a+b+c) ^2=a^2+b^2+c^2+2(ab+bc+ca)

(9)^2=a^2+b^2+c^2+2(36)

81=a^2+b^2+c^2+72

a^2+b^2+c^2=9