Compare expanded and factorised information
The same quadratic can be written as \(f(x)=-2x^{2} + 8x + 64\) and \(f(the requested value(x + 4)(x - 8)\). Use the most useful form to find the \(x\)-intercepts, \(y\)-intercept, axis, vertex, and range.
Worked practice: read the quadratic graph
Work through the graph features in order. You can type plain text or LaTeX-style notation.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.