Use discriminant to determine the value of k in a quadratic (no roots)

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The discriminant is the part of the quadratic formula underneath the square root symbol: b^2−4ac. The discriminant tells us whether there are two solutions, one solution, or no solutions.

If b^2−4ac=0 (1 real root)
If b^2−4ac GREATER THAN 0 (2 real root)
If b^2−4ac LESS THAN 0 (0 real root)

Q1. The function 3x^2+4x+k=0 has no zeros. What is the value of k?

Q2. The function −2x^2+6x+k=0 has no zeros. What is the value of k?
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Комментарии
Автор

but what if there are 4 terms like
3x^2-7x+2a-1=0

frizzymations
Автор

w2 (k + 3) w + 3k= 0 how to solve this one?

viensanchez
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So what kind of math problems do you encounter where you do not know the c term in a quadratic equation like in these 2 examples? Is this applied in higher mathematics somewhere?

adorablewigglingbunnynoses