Quadratic Equations Part 2

Factor

k²+7k+10

• (k+2)(k+5)

• (k-2)(k-5)

• (k+10)(k+4)

• (k+2)(k-5)

Factor

3v² - 4v - 7

• (3v-7)(v+1)

• 3(v-7)(v-1)

• (3v+1)(v-9)

• (3v+1)(v-10)

Solve
x² + 2x - 24 = 0

• x = -6, x = 4
• x = 6, x = -4
• x = 12, x = -2
• x = 8, x = -3

Tags

CCSS.HSA-REI.B.4B

Solve (k + 1)(k − 5) = 0

• (1,5)

• (-1,5)

• -1, 5

• 1, 5

Tags

CCSS.HSA-REI.B.4B

An object in launched directly upward at 64 feet per second (ft/s) from a platform 80 feet high. Its height is represented by the equation 
s(t) = –16t² + 64t + 80.
What will be the object's maximum height? 

• 2 ft
• 80 ft
• 144 ft
• 64 ft

The function f(t) = -5t²+20t + 60 models the approximate height of an object t seconds after it is launched. How many seconds does it take the object to hit the ground?

• 4 seconds

• -2 seconds

• 6 seconds

• 9 seconds

For a scene in a movie, a sack of money is dropped from the roof of a 600 foot skyscraper. The height of the sack above the ground is given by h = -16t² + 600, where t is the time in seconds. What does the y-intercept on the graph represent?

• The starting height of the sack

• The time it took the sack to hit the ground

• The starting time the sack was dropped.

Fully Factor the Following
25x²-81

• (5x-9)²
• (5x+9)(5x-9)
• 25(x-9)²
• (9x+5)(9x-5)

Tags

CCSS.HSA.APR.C.4

What is another word for zeros?

• y-intercepts
• roots
• vertex
• axis of symmetry

What piece of information does c identify in the following equation?
y=ax²+bx+c

• Zeroes
• Axis of Symmetry
• Direction
• y-intercept