Write the quadratic equation in general form. what is the value of b 2 - 4ac? 1 = 2x 2 7x 40 41 57

= 57

Step-by-step explanation:

The general form of the quadratic equation is:

             ....[1]

Given the equation:

Subtract 1 from both sides we have;

or we can write this as:

We have to find the

Compare equation with equation [1]

a = 2 , b = 7 and c = -1

then;

Therefore, the  quadratic equation in general form is, and the value of   is, 57

need more info

step-by-step explanation:

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!