Sketch the graph of the function y = x2 − 6x + 4
Step 1 Does not factorise so... |
y + 5 = x2 − 6x + 4 + 5 |
Step 2 Find the intercepts |
y = (x − 3)² − 5 |
Step 3 Put y = 0 into the equation. |
0 = (x − 3)² − 5 |
Step 4 Now sketch the graph. |