# Math Is Fun Forum

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## #1 2023-11-19 23:48:10

Bob
Registered: 2010-06-20
Posts: 10,503

KerimF:

18th November 2023

May I add... as an extended exercise...

Prove that, for any value of k, the roots, x1 and x2, of the equation kx^2 + x + k = 0 satisfy x1=1/x2.

moved by Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

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## #2 2023-11-20 00:07:30

Bob
Registered: 2010-06-20
Posts: 10,503

### Re: quadratic exercise by KarimF

Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

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