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Find the constant k such that the quadratic 2x^2 + 3x + 8x - x^2 + 4x + k has a double root.

 Jun 9, 2024
 #1
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Simplify as

 

x^2 + 15x + k   

 

This will have a double root when the discriminant =  0

 

15^2 - 4 (1) k  = 0

 

225 = 4k

 

k =  225 /  4

 

cool cool cool

 Jun 9, 2024

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