Evaluate \(\frac{(3.2)^2 - (4.8)^2}{3.2 + 4.8}\)
Question
Evaluate \(\frac{(3.2)^2 - (4.8)^2}{3.2 + 4.8}\)Options
A) -0.08
B) -1.60
C) -10.24
D) -12.80
The correct answer is B.
Explanation:
\(\frac{(3.2)^2 - (4.8)^2}{3.2 + 4.8} = \frac{(3.2 - 4.8)(3.2 + 4.8)}{(3.2 + 4.8)}\)
= 3.2 - 4.8
= -1.60
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Discussion (2)
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Please,change the denominator to 3.2 + 4.8.
\(\frac{(3.2)^2 - (4.8)^2}{3.2 + 4.8} = \frac{(3.2 - 4.8)(3.2 + 4.8)}{(3.2 + 4.8)}\)
= 3.2 - 4.8
= -1.60