If the difference between the roots of the equation x2 + kx + 1 = 0 is strictly less than , then k can be any element of the interval
( - 3, 3)
None of the above
If the roots of the equation x2 + px + q = 0 are in the same ratio as those of the equation x2 + lx + m = 0, then which one of the following is correct ?
p2m = l2q
m2p = l2q
m2p = q2l
m2p2 = l2q
A.
p2m = l2q
If the graph of a quadratic polynomial lies entirely above x-axis, then which one of the following is correct ?
Both the roots are real
One root is real and the other is complex
Both the roots are complex
Cannot say