Mathematics for IGCSE & O level - Graphs Of Functions (Section 2 - No. 37)
For the equation y = x² - 6x + 9, what is the x-coordinate of the vertex?
0
3
6
9
Explanation
The x-coordinate of the vertex can be found using -b/2a, where a=1 and b=-6. So, -(-6)/2(1) = 3.
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