Q. Put the quadratic into vertex form and state the coordinates of the vertex.y=x2+8x−16Vertex 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 transform the given quadratic equation into vertex form.The given quadratic equation is y=x2+8x−16.To complete the square, we need to find a value that, when added and subtracted to the equation, forms a perfect square trinomial with the x2+8x part.The value needed is (8/2)2=42=16.
Add and Subtract Value: Add and subtract the value found inside the equation.y=x2+8x+16−16−16We added and subtracted 16 to create a perfect square trinomial while keeping the equation balanced.
Rewrite with Perfect Square: Rewrite the equation with the perfect square trinomial and the constant term.y=(x2+8x+16)−32Now, the expression in the parentheses is a perfect square trinomial.
Factor Perfect Square: Factor the perfect square trinomial.y=(x+4)2−32The factored form of x2+8x+16 is (x+4)2.
Write in Vertex Form: Write the equation in vertex form and state the coordinates of the vertex.The vertex form of the equation is y=(x+4)2−32.The vertex (h,k) is found by considering the form y=a(x−h)2+k. Here, h=−4 and k=−32.So, the coordinates of the vertex are (−4,−32).
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