Root questions

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Find the Rotts of x^2 + ( k^2+1 /k)x+1 = 0





Find all values of k that ensure that the roots are real for x-k(x-1)(x-2)=0


No idea how to do these...
-Anna
 
You could use the quadratic formula.

. . . . a = 1
. . . . b = k<sup>2</sup> + 1/k (or did you mean (k<sup>2</sup> + 1) / k ?)
. . . . c = 1

For the second one also, you can multiply it out and then use the quadratic formula. Then you have to make sure that the thing under the radical is not negative. If it is negative, then the roots are not real. Otherwise, they are real.
 
ya... I meant you mean (k2 + 1) / k ) How do you write your expodents like that on the computer btw?
 
In order to have x<SUP>n</SUP> type x<SUP>n</SUP>.
For x<SUB>n</SUB> type x<SUB>n</SUB>.
 
In order to have it work you have to see that the HTML box at the bottom of the page is NOT checked.

A possible alternative for x² and x³ may be to use Alt & 2 and Alt & 3. Lots of other Alt & somethings on many computers.
 
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