Q. Put the quadratic into vertex form and state the coordinates of the vertex.y=x2+10x+9Vertex Form: y=Vertex: (□,□)
Identify vertex form: Identify the vertex form of a parabola.The vertex form of a parabola is given by y=a(x−h)2+k, where (h,k) is the vertex of the parabola.
Factor out coefficient: Factor out the coefficient of the x2 term if it is not 1. In this case, the coefficient is already 1, so we can proceed to the next step.
Find square of half: Find the square of half the coefficient of the x term to complete the square.Half of the coefficient of x is 210=5.Squaring this gives us 52=25.
Add and subtract square: Add and subtract the square of half the coefficient of x inside the equation.y=x2+10x+(52)−(52)+9This step ensures that we can form a perfect square trinomial while keeping the equation balanced.
Rewrite equation grouping: Rewrite the equation grouping the perfect square trinomial and combining the constants.y=(x2+10x+25)−25+9y=(x+5)2−16
Equation in vertex form: Now the equation is in vertex form.Vertex Form: y=(x+5)2−16
Identify vertex coordinates: Identify the coordinates of the vertex from the vertex form.The vertex (h,k) is given by the values inside the parenthesis and the constant term.Here, h=−5 and k=−16.Vertex: (−5,−16)
More problems from Convert equations of parabolas from general to vertex form