Q. Put the quadratic into vertex form and state the coordinates of the vertex.y=x2−16xVertex Form: y=Vertex: (□,□)
Identify vertex form: Identify the vertex form of a parabola.The vertex form of a parabola is y=a(x−h)2+k, where (h,k) is the vertex of the parabola.
Complete the square:Complete the square to rewrite the given equation y=x2−16x in vertex form.First, factor out the coefficient of the x2 term, which is 1 in this case, so we can leave it as is.Next, take half of the coefficient of the x term, which is −16, and square it to complete the square. Half of −16 is −8, and (−8)2=64.
Add and subtract terms: Add and subtract the square of half the coefficient of x inside the equation.y=x2−16x+64−64We added 64 to complete the square and then subtracted 64 to keep the equation balanced.
Rewrite equation by grouping: Rewrite the equation by grouping the perfect square trinomial and the constant term.y=(x2−16x+64)−64y=(x−8)2−64Now the equation is in vertex form.
Identify vertex: Identify the vertex of the parabola.The vertex form of the equation is y=(x−8)2−64.Comparing this with the standard vertex form y=a(x−h)2+k, we find that h=8 and k=−64.Therefore, the vertex of the parabola is (8,−64).
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