SOLUTION: Find K so that the equation 2X^2+KX+8=0 has no real number root.

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Question 174636: Find K so that the equation 2X^2+KX+8=0 has no real number root.
Found 2 solutions by MathLover1, Mathtut:
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
Solved by pluggable solver: Quadratic Formula
Error: Enter WHOLE numbers only.
If you need to enter fractions, multiply EVERY term by the LCD to make the numbers whole. If you need to enter decimal values, multiply EVERY number by some factor of 10 (to move the decimal point) to make the values whole.

Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
discriminant b%5E2-4achas to be less than zero in order to have no real roots aX%5E2%2BbX%2BC=0
:
K%5E2-4%282%29%288%29%3C0
:
K%5E2%3C64
:
highlight%28-8%3CK%3C8%29