3 marksFoundation
Consider the quadratic expression .
- (a)[3]
By completing the square, find the minimum value of the expression.
Work it out, then check it
Your working is checked step by step against the answer key, with method marks, units and carried-forward errors handled the way a mark scheme handles them.
Answer this and get it marked, freeFree account, no card. Three marked written answers a day on the free plan.