Range of k for Non-Real Roots: Solve x2 + (k - 2) x + (k + 3)

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SUMMARY

The discussion focuses on determining the range of values for k in the quadratic equation y = x² + (k - 2)x + (k + 3) such that the roots are not real. The key method to solve this problem is by analyzing the discriminant, which must be less than zero for the roots to be non-real. Specifically, the discriminant is given by D = (k - 2)² - 4(k + 3). Setting D < 0 leads to the inequality that defines the range of k.

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Homework Statement


Find the range of values of k for which the roots of the equation
are not real.



Homework Equations


y = x2 + (k - 2) x + (k + 3)


The Attempt at a Solution


I have no idea...
 
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Look at the discriminant.
 
dirk_mec1 said:
Look at the discriminant.

Or complete the square (same result, obviously) :smile:
 

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