If the roots of the equation x^2 – kx + 16 = 0 are equal, find the value of k.

Topic: Algebra
Subtopic: Quadratic Discriminant

A±4

B±6

C±8

D±12

Explanation

For equal roots, discriminant D = b^2 – 4ac = 0 => (-k)^2 – 4(1)(16) = 0 => k^2 – 64 = 0 => k = ±8.

Exam Relevance

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