0

Guest

Courses New

If a^2+b^2+c^2= 20, a+b+c= 0 then find the value of ab+bc+ca?

If a^2+b^2+c^2= 20, a+b+c= 0 then find the value of ab+bc+ca?

Grade:9

2 Answers

Chelsi Kothari
38 Points
6 years ago
(a+b+c)2 = a2 + b2+c2+2(ab + bc+ca)
let  (ab + bc+ca) be x
(0)2 = 20 + 2(x)
-20 =2x
-20/2 = x
-10 = x
Therefore ab+ bc+ca = -10
ankit singh
askIITians Faculty 614 Points
3 years ago
 
(a+b+c)2 = a2 + b2+c2+2(ab + bc+ca)
let  (ab + bc+ca) be x
(0)2 = 20 + 2(x)
-20 =2x
-20/2 = x
-10 = x
Therefore ab+ bc+ca = -10

Think You Can Provide A Better Answer ?

Other Related Questions on Algebra

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More