Answer
a)$10$
b)$2x^2+3x+1$
c)$2x^2+4xh+2h^2-3x-3h+1$
Work Step by Step
a) If $f(x)=2x^2-3x+1$ then plug in $x=3$ to find: $f(3)=2(3^2)-3(3)+1=18-9+1=10$
b) If $f(x)=2x^2-3x+1$ then plug in $-x$ to find: $f(-x)=2(-x)^2-3(-x)+1=2x^2+3x+1$
c)If $f(x)=2x^2-3x+1$ then plug in $x+h$ to find: $f(x+h)=2(x+h)^2-3(x+h)+1=2x^2+4xh+2h^2-3x-3h+1$
