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Quadratic Equation and More
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Quadratic Formula
 
   
 
What is the factored form of the following expressions?
 

 1. 

w2 + 18w + 77
a.
(w – 7)(w + 11)
c.
(w + 7)(w + 11)
b.
(w – 7)(w – 11)
d.
(w + 1)(w + 77)
 

 2. 

d2 + 16d + 63
a.
(d – 7)(d – 9)
c.
(d + 7)(d + 9)
b.
(d + 7)(d – 9)
d.
(d – 7)(d + 9)
 

 3. 

x2x – 42
a.
(x – 7)(x + 6)
c.
(x + 7)(x – 6)
b.
(x + 7)(x + 6)
d.
(x – 7)(x – 6)
 
   
 
What is the factored form of the expression?
 

 4. 

6x2 + 5x + 1
a.
(3x – 1)(2x – 1)
c.
(3x – 1)(2x + 1)
b.
(3x + 1)(2x – 1)
d.
(3x + 1)(2x + 1)
 

 5. 

15x2 – 16xy + 4y2
a.
(3x – 2y)(5x + 2y)
c.
(3x + 2y)(5x – 2y)
b.
(3x – 2y)(5x – 2y)
d.
(3x + 2y)(5x + 2y)
 
   
 
What is the factored form of the expression?
 

 6. 

r2 – 49
a.
(r – 7)(r + 7)
c.
(r – 7)(r – 7)
b.
(r + 7)(r + 7)
d.
(r – 7)(r + 9)
 

 7. 

s2 – 81
a.
(s – 9)(s – 9)
c.
(s – 9)(s + 9)
b.
(s – 9)(s + 11)
d.
(s + 9)(s + 9)
 
   
 
Solve the equation using square roots.
 

 8. 

mc008-1.jpg
a.
–3, 3
c.
mc008-2.jpg
b.
–9, 9
d.
no real number solutions
 
   
 
Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.
 

 9. 

mc009-1.jpg
a.
–5, –2
b.
5, –2
c.
–5, 2
d.
5, 2
 


 
 
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