I need help IMMEDIATELY! I'm so confused and this is due in 7 minutes!!

I won't hesitate to give brainliest to whoever answers fastest! Please please please show work

1. Given [tex]f(x)= 2x^2-4x+2[/tex], what is the value of [tex]f(2/3)[/tex]?

2. Given [tex]f(x)= 4x^2+2x-6[/tex], what is the value of [tex]f(1/4)[/tex]?