Question

a + b + c = 5 ,ab+ bc +ca =10, find a2+b2+c2​

Answer 1

Step-by-step explanation:

(a+b+c)^2=a2+b2+c2+2(ab+bc+ca)

(5)^2=a2+b2+c2+2(10)

25=a2+b2+c2+20

25-20=a2+b2+c2

a2+b2+c2=5

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