Five mark example problem I — task. Mathematics State Board, Class 10.

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Find the values of \(k\), for which the quadratic equation \(kx^2 - (8k + 4)x + 81 = 0\) has real and equal roots.

Answer:

\(k =\)

\(-\frac{1}{16}\)
\(4\)
\(-4\)
\(\frac{1}{16}\)

(Note: Select multiple answers if necessary.)

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