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# Chapter 4 Section 8 Use the Quadratic Formula In this assignment, you will be able to... 1.Solve a quadratic equation by using the quadratic formula. 2.

## Presentation on theme: "Chapter 4 Section 8 Use the Quadratic Formula In this assignment, you will be able to... 1.Solve a quadratic equation by using the quadratic formula. 2."— Presentation transcript:

Chapter 4 Section 8 Use the Quadratic Formula In this assignment, you will be able to... 1.Solve a quadratic equation by using the quadratic formula. 2. Use quadratic formula to model object launched.

Solve the equation by using the quadratic formula. 1.)

Answer: Original equation Subtract 2 from both sides a=1b=3c=-2 Find a, b and c Plug in a, b and c into the quadratic formula. Solve or

Solve the equation by using the quadratic formula. 2.)

Answer:

Solve the equation by using the quadratic formula. 3.)

Answer:

Solve the equation by using the quadratic formula. 4.)

Answer:x=-1 or x=5

Solve the equation by using the quadratic formula. 5.)

Answer:

Solve the equation by using the quadratic formula. 6.)

Answer:x=2

Solve the equation by using the quadratic formula. 7.)

Answer:

Solve the equation by using the quadratic formula. 8.) Juggling. A juggler tosses a ball into the air. The ball leaves the juggler's hand 4 feet above the ground and has an initial velocity of 40 feet per second. The juggler catches the ball when it falls back to the height of 3 feet. How long is the ball in the air? Use the model launched formula

Answer:2.5 seconds

Solve the equation by using the quadratic formula. 9.) Basketball. A basketball player passes the ball to a teammate. The ball leaves the player's hand 5 feet above the ground and has an initial velocity of 55 feet per second. The teammate catches the ball when it returns to a height of 5 feet. How long is the ball in the air? Use the model launched formula

Answer:3.4 seconds

Solve the equation by using the quadratic formula. 10.) Biology. The number S of ant species in Kyle Canyon, Nevada, can be modeled by the function where E is the elevation (in meters). Predict the elevation(s) at which you expect to find 10 species of ants.

Answer:1141 meters, 2090 meters

11.)Find the minimum or maximum value of the function

Answer:V(-3,15) Max value=15

12.) Solve the equation by factoring.

Answer:x=5 or x=8

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