The value of the function f(x) at [tex]x=a[/tex] can be determined by substituting a instead of x into the function expression.
1. When x=-1, then
[tex]f(-1)=2\cdot (-1)^3-3\cdot (-1)^2+7=-2-3+7=2.[/tex]
2. When x=1, then
[tex]f(1)=2\cdot 1^3-3\cdot 1^2+7=2-3+7=6.[/tex]
3. When x=2, then
[tex]f(-1)=2\cdot 2^3-3\cdot 2^2+7=16-12+7=11.[/tex]
