Question

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

Which values could he use for a, b, and c?



a = 3, b = ​−7​ , c = 20

a = 3, b = 7, c = −20

a = 3, b = ​−20​ , c = 7

a = 3, b = 20, c = −7

Answer 1

option B. a=3, b=7, c=-20

I just took the test :)

Explanation:

Answer 2

Answer: Second option.

Explanation:

Given a Quadratic equation in the form:

`ax^2+bx+c=0`

It can be solve with the Quadratic formula. This is:

`x=(-b\±√(b^2-4ac) )/(2a)`

In this case, given the Quadratic equation:

`3x^2=20-7x`

You can rewrite it in the form
`ax^2+bx+c=0`:

- Subtract 20 from both sides of the equation:

`3x^2-20=20-7x-20\\\\3x^2-20=-7x`

- Add
`7x` to both sides of the equation:

`3x^2-20+7x=-7x+7x\\\\3x^2+7x-20=0`

Therefore, you can identify that:

`a=3\\b=7\\c=-20`