If the roots of the quadratic equation 2x2 + 8x + k = 0 are equal, then the value of k is:
2
8
4
none of these
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The positive value of k for which the equations x2 + kx + 64 = 0 and x2 - 8x + k = 0 will both have real roots, is
16
12
If 3 is a root of the quadratic equation x2 - px + 3 = 0, then p is equal to:
3
5
The solution set for the quadratic equation 2x2 = 288, is:
{12, 12}
{-12, -12}
{-12, 18}
{-12, 12}