Q. 16
Mark the Correct alternative in the following:
If one root of the equation 
is 4, while the equation 
has equal roots, the value of q is
A. 46/4
B. 4/49
C. 4
D. none of these
Answer :
given 4 is the root of x2 + px + 12 = 0
= 16 + 4p + 12 = 0
4p = - 28
P = -7
Given x2 + px + q = 0 has equal roots, then discriminant is 0.
D = b2 – 4ac = 0
p2 – 4q = 0
4q = 49
.
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