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

Question

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

Philoid · Accepted 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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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