Algebra 1 Quadratic Equations

Factor the equation:

16x² - 9 = 0?

• (16x+3) (16x-3)

• (4x+3) (4x-3)

• (16x-3) (16x-3)

• (4x+3) (4x+3)

Solve by taking square roots:

5b² - 4 = 41

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no real solution

How many zeros does this parabola have? 

• 3

• 2

• 0

• 1

What are the solutions to...

• x = 3 , x =-5

• x = 3 , x= 5

• x = 1.5 , x= -5

• x = -1.5 , x = 5

What are the x- intercepts?

• x= 0 and x= -4

• x= 0 and x= 4

• y= 0

• x= 2

When looking at a quadratic graph, the solution(s) are always the _____________.

• y-intercept

• vertex

• x-intercept(s)

• axis of symmetry

Find the best fitting quadratic model for the data given.

• y = 1.2x² + 13x + 504.3

• y = 12x² + 13x + 504.3

• y = .12x² + 1.3x + 504.3

Using the quadratic curve of best fit, find the height of the ball when it traveled a distance of 10 feet.

• 12.8 ft

• 13.3 ft

• 11.1 ft

• 17 ft

What are the solutions?

• 0 and 8

• -2 and -4

• 3 and -1

• 2 and 4

Solve: (x + 7)² = 81

• 2

• -16

• -2

• 9

• 74