Given \(f(x) = 3x + 2\), we are often asked to find \(f(2)\) or \(f( - 3)\). To do this we substitute \(2\) or \(- 3\) for \(x\). So, \(f(2) = 3(2) + 2 = 8\) and \(f ...

If you're feeling confident, try this more difficult example. Don't be worried if it looks hard, the process you go through is just the same as before. Replace \(x\) with the function and then ...