Quadratic+3+Hand+Drawn+Parabola


 *  Hand Drawn Parabola **

__Quadratic Formula by Jenn__
y = x2 + 2x – 15

x =__-b ± √b2 – 4ac__ 2a

x =__-2 ± √22 – 4(1)(-15)__2(1)

x =__-2 ± √4 + 60__ 2

x =__-2±√64__ 2

x = __-2±8__ 2 x =__-2 + 8__ 2 ** x = 3 **

x = __-2 - 8__ 2 ** x = -5

**

__Factoring by Jenn__
y = x2 + 2x -15 0 = (x -3) (x + 5) ** x = 3 x = -5(3,0) (-5,0)

**

__Completing the Square by Mat__
y= x² +2x-15

x² +2x-15=0

x² +2x-15=16 √(x +1)²=√16

x+1=±4 -1 -1 x=±4-1

** -4-1=-5 4-1=3

x=-5 x=3

**

__Calculating Vertex and Axis of Symmetry by Michelle__
x-intercepts: ** (-3,0) (5,0) ** Axis of Symmetry: ** -1 ** Equation: y= x^2 + 2x - 15 y= 1^2 + 2(-1) - 15 y= 1 + -2 - 15 y= 1 + -17 Vertex = ** (-1, -16) **