Completing the Square Practice

Find the vertex of this quadratic equation:

 $y=x^2+8x+18$  

• (4,2)

• (-4,2)

• (8,18)

• (-4,-2)

• (4,-2)

Find the vertex of this quadratic equation:

 $y=x^2-4x+8$  

• (-2,4)

• (2,-4)

• (0,8)

• (-4,8)

• (2,4)

Find the vertex of this quadratic equation:

 $y=x^2-2x-2$  

• (2,3)

• (2,-2)

• (-1,-3)

• (1,-3)

• (-1,3)

Find the vertex of this quadratic equation:

 $y=x^2+2x+3$  

• (1,2)

• (-1,2)

• (-1,-2)

• (2,3)

• (1,-2)

Find the vertex of this quadratic equation:

 $y=x^2+4x+3$  

• (2,-1)

• (4,3)

• (-2,-1)

• (2,1)

• (-2,1)

Find the vertex of this quadratic equation:

 $y=x^2-6x+8$  

• (-3,-1)

• (3,-1)

• (-3,1)

• (-6,8)

• (-1,3)

Find the vertex of this quadratic equation:

 $y=x^2-10x+12$  

• (0,12)

• (10,12)

• (-5,13)

• (-5,-13)

• (5,-13)

Find the vertex of this quadratic equation:

 $y=x^2+12x+40$  

• (4,-6)

• (-12,40)

• (-6,-4)

• (-6,4)

• (6,4)

Check all of the following which are TRUE for the parabola that would result from graphing this equation:
 $y=-2\left(x+4\right)^2-5$  

• Opens up

• Opens down

• Vertex is (4,-5)

• y-intercept is (0,-37)

• Has 2 x-intercepts

Check all of the following which are TRUE for the parabola that would result from graphing this equation:
 $y=2\left(x-5\right)^2+15$  

• Opens up

• Opens down

• Vertex is (5,15)

• y-intercept is (0,65)

• Has 2 x-intercepts