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castortr0y [4]
2 years ago
8

Simplify the expression. a)1/64 b)2^-30 c)64 d)2^30

Mathematics
2 answers:
Korolek [52]2 years ago
6 0

\left(\dfrac{(-1)^5}{(-2)^{-3}} \right)^2\\\\\\=\left(\dfrac{-1}{\dfrac{1}{(-2)^3}} \right)^2\\\\\\=\left(-1 \times -8\right)^2\\\\=8^2\\\\=64

Nitella [24]2 years ago
4 0

Answer:

\huge\boxed{\bf\:64}

Step-by-step explanation:

\left(\frac{(-1)^{5}}{\left(-2\right)^{-3}}\right)^{2}

Now, simplify (-1)^{5} = -1. Then,

\left(\frac{-1}{\left(-2\right)^{-3}}\right)^{2}

Calculate: (-2)^{-3} = \frac{1}{(-2)^{3}} = - \frac{1}{8}.

\left(\frac{-1}{-\frac{1}{8}}\right)^{2}

Divide -1 by - \frac{1}{8}. The result will be 8.

\left(-\left(-8\right)\right)^{2} \\= 8^{2}

Calculate 8 to its square which is 64.

8^{2}\\=\boxed{\bf\: 64} \: \:\mathrm{(3^{rd} \: option)}

\rule{150pt}{2pt}

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