September 12, 2014
Solve the quadratic.
x2 - 3x - 15 = 0
x2 - 3x - 15 = 0
September 12, 2014
P.5 Solving Equations
Objective: Solve equations graphically and algebraically.
* solve by factoring
* solve by extracting square roots
* solve by completing the square
* solve by quadratic formula
* solve by graphing
Solve by factoring.
1.
2x2 + 5x - 3 = 0
September 12, 2014
Solve by factoring:
6x2 - 7x - 5 = 0
Solution: x = 5/3 or x = -1/2
September 12, 2014
Objective: Solve equations graphically and algebraically.
Solve by extracting square roots.
2.
3(x - 5)2 = 48
September 12, 2014
Objective: Solve equations graphically and algebraically.
Solve by completing the square.
3. x2 + 6x - 15 = 0
September 12, 2014
Solve by completing the square.
x2 + 8x - 21 = 0
Solution:
x =+√37 - 4
September 12, 2014
Objective: Solve equations graphically and algebraically.
Solve by completing the square.
4. 2x2 + 8x - 13 = 0
September 12, 2014
Objective: Solve equations graphically and algebraically.
Solve the the quadratic formula.
5.
2
2x - 3x + 1 = 0
September 12, 2014
Objective: Solve equations graphically and algebraically.
Use a calculator to approximate the solutions.
6. x3 + x + 1 = 0
September 12, 2014
Objective: Solve equations graphically and algebraically.
Solve algebraically.
7.
3 - 5x
= 4
September 12, 2014
Objective: Solve equations graphically and algebraically.
Solve by using a calculator and finding the
intersections.
8.
3 - 5x
= 4
September 12, 2014
HW: (P.5) Pg.46: 1-23odd, 29, 31, 33, 41, 43, 45, 57, 60