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Algebra Homework Help : Expansion of (a ± b)(y ± b) by FOIL



Quiz : Expand each of the following and type only the expanded answer in the input box.
Leave no spaces when typing the answer.
EXAMPLE: (2x + 3)(4x - 7y) = 8x2-14xy+12x-21y
Since there are multiple ways of writing an answer, it is possible the computer may mark a correct answer wrong.
So, please use the FOIL method and always check the explanation.


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1.

 (9 + 4y)(11 - 4y) =
 
Hint      

2.

 (10 - yz)(10 + yz) =
 
Hint      

3.

 (3x + 2)(6x + 5) =
 
Hint      

4.

 (7a - 4b)(7a - 4b) =
 
Hint      

5.

 (x + 5z)(x - 5z) =
 
Hint      

6.

 (2y + y3)(5y + y2) =
 
Hint      

7.

 (4y + 3)(2y - 9) =
 
Hint      


 
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Algebra
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of (a ± b)^2