Nick is solving the equation 3x2 = 20 – 7x with the quadratic formula.

What values should he use for a, b, and c?

a = 3
b = 20
c = –7

a = 3
b = –7
c = 20

a = 3
b = 7
c = –20

a = 3
b = –20
c = 7

Question

Nick is solving the equation 3x2 = 20 – 7x with the quadratic formula.

What values should he use for a, b, and c?


a = 3
            b = 20
            c = –7

       a = 3
            b = –7
            c = 20

       a = 3
            b = 7
            c = –20

       a = 3
            b = –20
            c = 7

johnweldon1993 · Answer

You need to get this into the form

$$\large Ax^2 + Bx + C$$

You have

3x^2 = 20 - 7x

So subtract 20 from both sides and add 7x to both sides...

$$\large 3x^2 + 7x - 20$$

Now the 'a' 'b' and 'c' are just the coefficients of that equation

johnweldon1993 · Answer

Alright...on what? :)

johnweldon1993 · Answer

Incorrect...

So hang on...do you understand how I got it into the form I did? subtracting and adding from both sides and getting the equation to look how I have it?