Answer:
1. 4
2. 16
3. 9
Step-by-step explanation:
Completing the square requires a quadratic in [tex]ax^2+bx=c[/tex] form. Once in this form, calculate [tex](\frac{b}{2})^2[/tex].
1. [tex](\frac{b}{2})^2=(\frac{-4}{2})^2=4[/tex]
2. [tex](\frac{b}{2})^2=(\frac{-8}{2})^2=16[/tex]
3. Requires you divide everything by 3 first.
[tex]\frac{3x^2+18x}{3} =\frac{249}{3} \\x^2+6x=81[/tex]
[tex](\frac{b}{2})^2=(\frac{6}{2})^2=9[/tex]
