Sienna is solving the quadratic equation by completing the square.

3x2 + 9x - 4 = 0

3x2 + 9x = 4

A (x2 + 3x) = 4

What is the value of A?

A:-4

B:-3

C:3

D:4

If you would like to know the value of A, you can do this using the following steps:

3x^2 + 9x - 4 = 0

3x^2 + 9x = 4

A (x^2 + 3x) = 4

A = 3:

3 * (x^2 + 3x) = 4

3x^2 + 9x = 4

The correct result would be C: 3.