B. Rewrite in standard form. $f(x)=(4 x-1)(3 x-5)$

Step 1 ：Expand the expression: \(f(x) = (3x - 5)(4x - 1)\)

Step 2 ：Simplify the expression: \(f(x) = 12x^2 - 23x + 5\)

Step 3 ：\(\boxed{f(x) = 12x^2 - 23x + 5}\)