Question

Find a2+b2+c2 if a + b + c = 10 and ab + bc + ca = 35​

Answer 1

Answer:

we know that

(a+b+c)² = a²+b²+c²+ 2(ab+bc+ca)

Putting the respective values

(10)² = a²+b²+c² + 2(35)

100 = a²+b²+c² + 70

a²+b²+c² = 100-70

a²+b²+c² = 30

30 is the answer

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