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For the quadratic equation 2x^2 - 4x + k = 0 to have real roots, what must be the condition on k?

C. K ? 8
Posted in:  Quadratic Equations -  Algebra -  Mathematics

If a pipe can fill a tank in 6 hours and another pipe can empty it in 8 hours, how long will it take to fill the tank if both pipes are opened together?

D. 16 HOURS
Posted in:  Time & Work -  Aptitude -  Mathematics

What is the product of the roots of the quadratic equation 3x^2 + 12x + 9 = 0?

B. -3
Posted in:  Quadratic Equations -  Algebra -  Mathematics

If one root of the quadratic equation x^2 - 7x + k = 0 is 3, what is the value of k?

A. 12
Posted in:  Quadratic Equations -  Algebra -  Mathematics

Which of the following equations has roots that are both real and equal?

A. X^2 - 4X + 4 = 0
Posted in:  Quadratic Equations -  Algebra -  Mathematics