find the vertex of y= x²-2x-3
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find the vertex of y= x²-2x-3
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Rewrite in vertex form and use this form to find the vertex (h, k).
(1, -4)
.
Answer:
The y value of the vertex is found by substituting this into the formula for f (x). This formula is derived by rewriting y = ax2 + bx + c in standard form. In the example above, y = x2 + 2x - 3, this gives a vertex with x = -2/2 = -1, and y = (-1)2 + 2(-1) - 3 = 1 - 2 - 3 = -4.