Question

For what value of k, (4 - k) x2 + (2k + 4) x + (8k + 1) = 0, is a perfect square.
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Answer 1

Answer:

The given question is solved in the uploaded photo. An additional example is given in the second photo.

Concept- If a quadratic equation has real and equal roots then it is a perfect square and if a quadratic equation is a perfect square then it will have real and equal roots.