SOLUTION: How to solve and graph the quadraic function. Find the vertex, axis and is it wider or narrower than x^2 f(x)= 2x^2+8x+3

Question 300811: How to solve and graph the quadraic function. Find the vertex, axis and is it wider or narrower than x^2
f(x)= 2x^2+8x+3
Answer by Edwin McCravy(20054) (Show Source): You can put this solution on YOUR website!
How to solve and graph the quadraic function. Find the vertex, axis and is it wider or narrower than x^2



1. Find the x-coordinate of the vertex by evaluating 
2. Find the y-coordinate of the vertex by substituting the value of the 
x-coordinate found in step 1 for x in the equation 
3. The axis of symmetry is the vertical line whose equation is 
4. A: If , the parabola is wider than the graph of the parabola
      whose equation is .  
   B: If , the parabola is narrower than the graph of the
      parabola whose equation is .

1. 
2. 

So the vertex is 

3. 
4. , narrower

The graph of  is in red.
The graph of  is in green. 

  

Edwin

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