Question

3. The discriminant of the quadratic equation x² - 4x + 1 = 0
(a) -20
(b) 20
(c) 12


I need the full explanation.​

Answer 1

Answer:

discriminant is b^2-4ac here b= -4, a=1, c=1

b^2-4ac= -4×-4-4×1×1

= 16-4

=12

hence it's discriminant is 12