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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.

(3x + 5y)(5x + 4z) =
 
Hint      

2.

(7a - 6)(7a - 8) =
 
Hint      

3.

(z - 11)(z + 5) =
 
Hint      

4.

(4x + 5y)(4x + 5y) =
 
Hint      

5.

(z2 - 4)(z3 + 7z) =
 
Hint      

6.

(a - 4)(a - 10) =
 
Hint      

7.

(10 - yz)(10 + yz) =
 
Hint      


 
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