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The formula of area is side by side or length by length (A=s^2 or A=l^2) but as we can see there is no specific number, therefore, we will use a variable (x and y but you can use what variable you want to use) . Now let us solve:
A = (s)(s) (side-s)
A = (x)(x)
A = (x-2)(x+2)
A = x^2-4 (I used special product)
0 0 0
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