Question

Determine the discriminant of x2 = 4.

a) 17
b) 16
c) -15
d) -10

help

Answer 1

b). 16.

Explanation:

x^2 = 4

We can write this as

x^2 + 0x - 4 = 0

The discriminant (b^2 - 4ac) =

0^2 - 4 * 1* -4

= 16.