Post on 18-Jan-2016
The Quadratic Formula
Chapter 8.6
The Quadratic Formula
If , then 2 0ax bx c 2 4
2
b b acx
a
Factor
x2 + 8x + 7 = 0
Factor
x2 + 11x + 18 = 0
Factor
x2 - 4x = 4
Factor
x2 - 6x = 8
Solve
4x2 + 12x + 9 = 0
Solve
3x2 - 7x = -2
Solve
3x2 = 15x + 18
A diver jumps from a platform which is 10 m above the water. Her height h in meters above the water t seconds after she jumps is modeled by the equation h = -4.9t2 + 3.5t + 10.8. About how long will it take her to reach the water?
A diver jumps from a platform which is 10 m above the water. Her height h in meters above the water t seconds after she jumps is modeled by the equation h = -4.9t2 + 3.5t + 10.8. About how long will it take the ball to reach the ground?
Homework