Mathematics for IGCSE & O level - Sketching Curves (Section 1 - No. 18)
If y = x² - 6x + 9, what is the turning point of the graph?
(3, 0)
(0, 3)
(0, 9)
(9, 0)
Explanation
x²-6x+9 factors to (x-3)². Therefore the turning point is (3, 0).
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