What is the value of b2 - 4ac for the following equation?

2x 2 - 2x - 1 = 0

The value of the discriminant is 12.

Step-by-step explanation:

We are given the quadratic equation is .

Now, we know,

The discriminant for the quadratic equation is given by .

On comparing the equations, we have,

a= 2, b= -2 and c= -1

So, the discriminant is given by,

i.e.

i.e. D= 12

Hence, the value of the discriminant is 12.

e) none of the above because the measure of angle cba is 101°