[tex]Answer:\\[/tex]
[tex]368[/tex]
[tex]Step\: by\: step \:explanation:\\[/tex]
[tex]12a^2-3ab+2b ; \\ \: if \: a=-5 \: and \: b=4
\\ 12a^2-3ab+2b = 12( - 5)^2-3( - 5)(4))+2(4) \\ 12a^2-3ab+2b = 300 + 60 + 8 \\ 12a^2-3ab+2b = 368[/tex]
