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

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

123

step-by-step explanation:

agngel

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!