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(a + b + c)(a + b - c)​

Sagot :

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This is how you should do r
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Answer:

[tex]a^{2} + 2ab + b^{2} - c^{2}[/tex]

Step-by-step explanation:

   A         B       C

A  a^2    ab    -ac

B  ab     b^2    -bc

C   ac    bc     -c^2

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