3 years ago

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

Mathematics

1 answer:

asambeis [7]3 years ago

8 0

Answer:

(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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