Q. Find the coordinates of the vertex of the following parabola algebraically. Write your answer as an (x,y) point.y=x2−12x+28Answer:
Identify Vertex Formula: To find the vertex of a parabola given by the equation y=ax2+bx+c, we can use the vertex formula for the x-coordinate, which is −2ab. In our equation, a=1 and b=−12.
Calculate x-coordinate: Calculate the x-coordinate of the vertex using the formula −2ab. Here, b=−12 and a=1, so the x-coordinate is −2⋅1(−12)=212=6.
Find y-coordinate: To find the y-coordinate of the vertex, we substitute the x-coordinate back into the original equation. So we will calculate y when x=6.
Substitute x into equation: Substitute x=6 into the equation y=x2−12x+28 to find the y-coordinate. y=(6)2−12(6)+28=36−72+28.
Simplify expression: Calculate the y-coordinate by simplifying the expression: 36−72+28=−36+28=−8.
Combine coordinates: Combine the x and y coordinates to form the vertex point. The vertex is at the point (6,−8).
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