Question

When the quadratic equation y = (x − 3)(4x + 2) is written in standard form, what is the value of the coefficient "b?"

1

4

−10

−6

Answer 1

y = (x − 3)(4x + 2)
y = 4x² + 2x − 12x − 6
y = 4x² − 10x − 6
y = ax² + bx + c ⇒ b = −10