Question

if a+b+c=12 and ab+bc+ca=28 they find a²+b²+c²
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Answer 1

Step-by-step explanation:

hope it works...................

Answer 2

Answer:

a²+b²+c² = 88

Step-by-step explanation:

Given,

a+b+c= 12, ab+bc+ca= 28, a²+b²+c²= ?

Formula,

(a+b+c)²= a²+b²+c²+ 2(ab+bc+ca)

(12)²= a²+b²+c² + 2(28)

144= a²+b²+c² +56

a²+b²+c² = 144 - 56

= 88