Question

what is the meaning of this formula and where it is used?
$a {}^{2} + b {}^{2} + c {}^{2}$
​

Answer 1

Answer:

I think you are talking about this formula…

a² + b² + c² =

(a+b+c)² - 2(ab + bc + ca)

The actual formula is

(a+b+c)² = a² + b² + c² +2( ab + bc + ca)

You can get this simple formula by multiplying (a+b +c) with (a+b+c).

(a+b +c)² = (a+b +c)*(a+b +c)

= a*(a+b +c) + b*(a+b +c) + c*(a+b +c)

= a² + ab + ac + ab + b² + bc + ca + bc + c²

= a² + b² + c² + 2ab + 2bc + 2ca

= a² + b² + c² + 2ab + 2bc + 2ca= a² + b² + c² + 2( ab + bc + ca)

I hope you get the formula and found it simple. If this in not the formula then reply…

Step-by-step explanation:

hope it's helpful,,

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