Question #8db74

2 Answers
Jan 23, 2018

?=x=1/a^2+ 1/b^2+ 1/c^2

Explanation:

If b*c + c*a + a*b = 0,

Prove that 1/a^2 -b*c + 1/b^2 - c*a + 1/c^2 -a*b = x.

Solve for x, I presume this is what the problem is you are trying to solve. This is not really something you actually call a proof, since you are solving for an unknown...

We can rewrite 1/a^2 -b*c + 1/b^2 - c*a + 1/c^2 -a*b = x this to:
1/a^2+ 1/b^2+ 1/c^2 = x + b*c + c*a + a*b
1/a^2+ 1/b^2+ 1/c^2 = x + 0
So, x or your question mark, ?=x=1/a^2+ 1/b^2+ 1/c^2.

Jan 23, 2018

Image reference....

Explanation:

![my http://notebook....](https://useruploads.socratic.org/zyyW3GBSRmOfEtPXpiGQ_New%20Doc%202018-01-23_1.jpg)

Hope it helps....
Thank you