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?

–4
–3
3
4

Answer 1

3x^2 + 9x - 4
3x^2 + 9x = 4
3(x^2 + 3x) = 4

Therefore, a = 3