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Damm [24]
3 years ago
10

(x+2) (x-2)=? (n+m) (n-m)=? (r+9) ( r-9)=?

Mathematics
1 answer:
asambeis [7]3 years ago
8 0

Answer:

  1. (x+2) (x-2)=x^{2}-4

(n+m) (n-m)=n^{2} -m^{2}

  • (r+9) ( r-9)=r^{2}-81

Step-by-step explanation:

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Another way to figure this is to write the proportion ...

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