Question

if a+b+c=9 and ab+bc+ca=26 find a square+b square+c square please explain step by step​

Answer 1

Step-by-step explanation:

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

81=^2=a^2+b^2+c^2+2(26)

81-2(26)=^2=a^2+b^2+c^2

=29

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