SOLUTION: can someone help me with this problem please? Give the coordinates of the vertex for the graph of the equation. y=2x^2+4x

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equation Customizable Word Problems -> SOLUTION: can someone help me with this problem please? Give the coordinates of the vertex for the graph of the equation. y=2x^2+4x      Log On


   

Question 804691: can someone help me with this problem please?
Give the coordinates of the vertex for the graph of the equation.
y=2x^2+4x
Answer by erica65404(394) About Me  (Show Source):
You can put this solution on YOUR website!
to do so you need to complete the square
y=2x%5E2%2B4x
y=2%28x%5E2%2B2x%29
y=2%28x%5E2%2B2x%2B1-1%29
y=2%28x%2B1%29%5E2-2
the vertex is (-1,-2)
graph%28+400%2C+400%2C+-10%2C+10%2C+-10%2C+10%2C+2x%5E2%2B4x%29