SOLUTION: I need help with this graph problem. Thank you. Give the equation of the axis of symmetry and the coordinates of the vertex of the graph of y=x^2+4x+3. Sketch the graph.

Algebra ->  Graphs -> SOLUTION: I need help with this graph problem. Thank you. Give the equation of the axis of symmetry and the coordinates of the vertex of the graph of y=x^2+4x+3. Sketch the graph.       Log On


   



Question 887441: I need help with this graph problem. Thank you.
Give the equation of the axis of symmetry and the coordinates of the vertex of the graph of y=x^2+4x+3. Sketch the graph.

Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
axis of symmetry is x = -b/2a = -4/2 = -2
now substitute -2 for x in the given equation
y = (-2)^2 +4*(-2) +3 = -1
coordinates of vertex are (-2, -1)
here is the graph
+graph%28+300%2C+200%2C+-10%2C+10%2C+-10%2C+10%2C+x%5E2+%2B4x+%2B3%29+