Question

If `(k + 1)x^2 + 3/2 x = 7` is a quadratic equation, then k cannot be equal to ______.

Answer 1

If `(k + 1)x^2 + 3/2 x = 7` is a quadratic equation, then k cannot be equal to –1.

Explanation:

For a quadratic the coefficient of x² must be nonzero. 

Here the coefficient is k + 1, so k + 1 ≠ 0 ⇒ k ≠ –1.