Question

Question The discriminant of the quadratic equation
10:
x2 - 4x + 1 = 0 is
(a) -20
(b) 20
(c) 12
(d) V12​

Answer 1

Answer:

(c) 12

Step-by-step explanation:

The discriminant of a quadratic

   ax² + bx + c = 0

is

   b² - 4ac.

The quadratic x² - 4x + 1 = 0 has a = 1, b = -4 and c = 1.

So its discriminant is

  b² - 4ac  =  (-4)² - 4×1×1 = 16 - 4 = 12.

Hope this helps!