Question

What is the value of the discriminant for the quadratic equation 0 = x + 2 + x2?

Discriminant = b2 – 4ac

A) -9
B) -7
C) 7
D) 9

Answer 1

Answer:

B- -7

Step-by-step explanation:

0 = x + 2 + x^2

Rearrange it

x^2 + x + 2 = 0

Then, using the discriminant

b^2 - 4ac

x^2 - a

x - b

2 - c

Insert the values into the discriminant

Using their coefficients

b^2 - 4ac

= 1^2 - 4 * 1^2 * 2

= 1 - 4 * 1 * 2

= 1 - 8

= -7

The value of the discriminate is -7

Answer 2

Answer: Answer:

B- -7

Step-by-step explanation:

0 = x + 2 + x^2

Rearrange it

x^2 + x + 2 = 0

Then, using the discriminant

b^2 - 4ac

x^2 - a

x - b

2 - c

Insert the values into the discriminant

Using their coefficients

b^2 - 4ac

= 1^2 - 4 * 1^2 * 2

= 1 - 4 * 1 * 2

= 1 - 8

= -7

The value of the discriminate is -7