Solve Quadractics Using Factoring: Question Preview (ID: 27921)


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Solve the equation by factoring: x^2 + 9x + 20 = 0
a) 4, 5
b) -5, -4
c) 9, 20
d) -4, 5

What is a quadratic equation?
a) An equation that has four terms
b) ) An equation that has degree 4
c) An equation that has two terms
d) An equation that has degree 2

A rocket is shot into the air with an initial velocity of 800 m/sec. The equation h = -16t^2 + 1440t models the height of the rocket. How long does it take for the rocket to hit the ground (h=0)?
a) 16 seconds
b) 90 seconds
c) 800 seconds
d) 1440 seconds

Solve x^2 + 4x – 32 = 0
a) -8, -4
b) 8, 4
c) -8, 4
d) 8, -4

n^3-4n^2-45n=0
a) 5,3,0
b) 0,9,-5
c) -9,5,0
d) 5,-3,0

16p^2-18p=9
a) 3/2,7/2
b) -6,-5/2
c) 6,-5/2
d) -3/8,-1/4

m^2=8m
a) 1,-9
b) 0,8
c) -1,-9
d) 2,5

x^2=-28+16x
a) 14,2
b) 6,-3
c) -6,-3
d) 6,3

Write a quadratic equation in the form ax^2 + bx + c = 0 that has the given numbers as solutions: (5, -3)
a) x^2 - 2x - 15 = 0
b) x^2 - 15x - 2 = 0
c) x^2 + 2x - 15 = 0
d) x^2 - 15x + 2 = 0

25y^2=144
a) 5,3
b) 12/5,-12/5
c) 5/2,-5/3
d) -2,4

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