[tex]\huge\text{Hey there!}[/tex]
[tex]\huge\boxed{\mathsf{5x^2 - 12 x + 3}}\\\huge\boxed{\mathsf{= 5(3)^2- 12(3)+ 3}}\\\\\\\huge\boxed{\mathsf{3^2}}\\\huge\boxed{\mathsf{=3\times3}}\\\huge\boxed{\mathsf{= \bf 9}}\\\\\\\huge\boxed{\mathsf{5(9) - 12(3) + 3}}\\\huge\boxed{\mathsf{= 45 - 36 +3}}\\\huge\boxed{\mathsf{= 9 + 3}}\\\huge\boxed{\mathsf{= 12}}\\\\\\\huge\boxed{Therefore, your\ answer is: \textsf{12}}\huge\checkmark[/tex]
[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]
~[tex]\huge\boxed{\frak{Amphitrite1040:)}}[/tex]