Question

if a^2 +b^2+c^2=50 and a+b+c=10.Then find the value of ab+bc+ca​

Answer 1

Answer:

25

Step-by-step explanation:

(a+b+c)²=a²+b²+c²+2(ab+bc+ca)

(10)²=50+2(ab+bc+ca)

50=2(ab+bc+ca)

25=ab+bc+ca

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