In Mathematics / College | 2025-08-21

What is the first step when rewriting $y=3 x^2+9 x-18$ in the form $y=a(x-h)^2+k$?

A. 3 must be factored from $3 x^2+9 x$
B. $x$ must be factored from $3 x^2+9 x$
C. 9 must be factored from $9 x-18$
D. 3 must be factored from $3 x^2-18$

Asked by roberto3832