Question

Which of the following is a quadratic equation?
(a) x² + 2x+ 1 = (4 – x)² + 3
(b) -2x² = (5 – x)[2x – 25]
(c) (k + 1)x² + 32 x = 7, where k = -1
(d) x³ – x² = (x – 1)³​

Answer 1

Answer:

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