Question

if a+b+ c= 7 and ab+ bc+ac=21,find value of a²+b²+c²​

Answer 1

Answer:

7

Step-by-step explanation:

(a+b+c)²=a²+b²+c²+2ab+2bc+2ca

(7)²=a²+b²+c²+2(21)

49=a²+b²+c²+42

a²+b²+c²=7

Answer 2

Answer:

Hope it helps

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