Question

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

Answer 1

here is what you need to do: multiply each term (example x*4x) and then just do some basic math do get equation like this ax^2+bx+c

Answer 2

Alternatively, you could even find the sum of roots, negate that, and divide by \(a\) (which obviously is 4 here).

Answer 3

But anyway, you don't want to get confused asking why I can do that, so follow @Ed25