Math, asked by geetanjali052213, 9 months ago

If a² + b ² +
c²= 29 and a+b+c=13
find ab + bc + ca

Answers

Answered by dwivediharsh2006

2

(a+b+c)²=(a²+b²+c²)+2(ab+bc+ca)

13²=29+2(ab+bc+ca)

169-29=2(ab+bc+ca)

140/2=ab+bc+ca

70 is the value of ab+bc+ca

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