Home
Flashcards
Preview
Algebra Exam 2
Home
Get App
Take Quiz
Create
(A+B)
2
A
2
+ 2AB + B
2
(A-B)
2
A
2
- 2AB +B
2
(A+B)(A-B)
A
2
-B
2
Foil in reverse..
(x+
p
)(x+
q
)
x
2
+ qx + px + pq
or
x
2
+ (p+q)x + pq
Example
x
2
+
9
x +
8
= (x+p)(x+q) = x
2
+ (
p+q
)x +
pq
We now list pairs of factors of 8 whose sum is 9.
Pairs of factors_ 2, 4..doesnt work because their sum is 8.
Pairs of factors_ 1, 8.. works because their sum is 9.
X
2
+ 9X + 8 = X
2
+ 1X + 8X + 8
Factoring a difference of two squares
A
2
- B
2
(A + B)(A - B)
Factoring a sum or difference of two cubes
A
3
+B
3
(A+B)(A
2
- AB + B
2
)
A
3
- B
3
(A - B)(A
2
+ AB + B
2
)
Author
simpso35
ID
45750
Card Set
Algebra Exam 2
Description
5.4-5.8, 6.1-6.8, 7.1-7.3
Updated
2010-10-29T11:59:49Z
Show Answers
Home
Flashcards
Preview