Math, asked by angelparishimla, 7 months ago

a+b+c =18 and a² + b²+c²=70
then value of ab+bc+ca is :

Answers

Answered by atahrv

1

Answer:

254

Step-by-step explanation:

(a+b+c)²=(a²+b²+c²)+ab+bc+ca

(18)²=(70)+ab+bc+ca

324-70=ab+bc+ca

ab+bc+ca=254

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