Question

When the quadratic equation y = (x − 2)(3x + 1) is written in standard form, what is the value of the coefficient "b"?
A. -5
B. 3
C. -2
D. 5

Answer 1

y = (x − 2)(3x + 1)
multiply out to
\[y=3x^2-6x+x-2\] simplify to:
\[y=3x^2-5x-2 = ax^2+bx+c\]
b=-5

here's what I get :)