Quadratic Equations By Factoring Worksheet With Answer Key Page 2

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4-3 Solving Quadratic Equations by Factoring
 
19. 
 
SOLUTION:  
Write the pattern.
 
 
Replace p and q with
 
 
Use the FOIL method to multiply.
 
 
Multiply each side by 5.
 
 
Factor each polynomial.
 
21. 
 
SOLUTION:  
The GCF of the two terms is 17c. Factor the GCF.
 
 
23. 
 
SOLUTION:  
Factor out 3.
 
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Page 2
 
2
2
2
Use the identity a
– b
= (a + b)(a – b) to factor x
– 4.

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