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.

all but the second one

step-by-step explanation:

cuz that one goes over 180

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