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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.

(6a - 7b)(3a - 5c) =
 
Hint      

2.

(x + 7)(x + 9) =
 
Hint      

3.

(3a2 - 5)(2a3 - a) =
 
Hint      

4.

(6 - 7a)(8 - 9a) =
 
Hint      

5.

(9 - xy)(9 + yz) =
 
Hint      

6.

(y + 8)(y - 6) =
 
Hint      

7.

(z - 11)(z + 5) =
 
Hint      


 
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