1. Bellwork: 2/23/15
1. Graph y = x2 + 4x + 3.
2. Identify the axis of symmetry, vertex, y-intercept, and zeros of the function above.

3. Information about Quadratics

4. Bellwork: 2/24/15
Identify the axis of symmetry, the vertex, and if the graph is opening upwards or downwards:
1)y= -x2+4x ) y= 3x2-18x+5

5. Quadratic Functions
We will...
solve quadratic equations by graphing.

6. quadratic equation
ax2 + bx + c = 0
y = ax2 + bx + c
0 = ax2 + bx + c

8. Solve the equation by graphing the related function.
2x2 – 18 = 0
–12x + 18 = –2x2

11. Solve the equation by graphing the related function.
1) 2x2 + 4x = –3
2) x2 – 8x – 16 = 2x2
3) 6x = –x2
4) –x2 + 4 = 0 5)
x = 0
6) -x2 + 12x - 36 = 0
7) 2x2 = 3x2 - 2x - 8
8) -2x2 - 6 = 0

13. 1)
x = 0
2) -x2 + 12x - 36 = 0
3) 2x2 = 3x2 - 2x - 8
4) -2x2 - 6 = 0