Question

If the roots of 5x² - k + 1 = 0 are real and distinct then

(a) -2√5 < k < 2√5

(b) k > 2√5 only

(c) k < -2√5

(d) either k > 2√5 or k < -2√5

Answer 1

Correct answer is (d) either k > 2√5 or k < -2√5

It is given that the roots of the equation(5x² - k + 1 = 0) are real and distinct.