Question

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

Answer 1

the answer is C.) 3

Explanation:

i took the test : )

Answer 2

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.