I need help with question number 5. Someone please help.

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Which function families have maximums and minimums? 1.)linear absolute value functions and exponential functions 2.) linear absolute value functions and quadratic functions 3.) linear absolute value functions and linear functions 4.) linear absolute value functions and constant functions

Can someone me with my math problems i have a bunch. i will give brainliest and lots of pleeeaaasssee