-0.08
-1.60
-10.24
-12.80
Correct answer is B
\(\frac{(3.2)^2 - (4.8)^2}{3.2 + 1.8} = \frac{(3.2 - 4.8)(3.2 + 4.8)}{(3.2 + 4.8)}\) = 3.2 - 4.8 = -1.60
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