Q. Put the quadratic into vertex form and state the coordinates of the vertex.y=x2+2x−24Vertex 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 for the quadratic equationy=x2+2x−24.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 and 2x terms.
Calculate Value: Calculate the value needed to complete the square.The coefficient of x is 2, so we take half of it, which is 1, and then square it to get 12=1.
Add and Subtract: Add and subtract the calculated value inside the equation.We add 1 and subtract 1 inside the parentheses to maintain the equality of the equation.y=x2+2x+1−1−24
Rewrite Equation: Rewrite the equation by grouping the perfect square trinomial and the constants.y=(x2+2x+1)−25
Factor Trinomial: Factor the perfect square trinomial.y=(x+1)2−25
Write in Vertex Form: Write the equation in vertex form.The vertex form of the equation is y=(x+1)2−25.
Identify Vertex Coordinates: Identify the coordinates of the vertex. The vertex form y=a(x−h)2+k gives us the vertex (h,k). In our equation y=(x+1)2−25, we have h=−1 and k=−25. Therefore, the vertex is (−1,−25).
More problems from Convert equations of parabolas from general to vertex form