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The sum of two numbers is 15 and the sum of their squares is

Answer and Explanations

SAURABH KUMAR
According to the given condition
a^2+b^2+c^2=170
ab+bc+ca=157
now we know that (a+b+c)^2 = a^2+b^2+c^2+2(ab+bc+ca)
on taking values we get (a+b+c)^2 = 170+2(157) = 484
or a+b+c = 22

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