Question
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Apply all relevant properties of exponents to simplify the following expressions. Enter your answer as an integer or completely simplified fraction without exponents. a) \( (-8)^{-2} \) Answer b) \( \left(-\frac{1}{8}\right)^{-2} \) Answer c) \( -8^{-2} \) Answer d) \( -\left(\frac{1}{8}\right)^{-2} \) Answer

Ask by Hill Gibbs. in the United States
Feb 26,2025

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Tutor-Verified Answer

Answer

a) 1/64 b) 64 c) –1/64 d) –64

Solution

We simplify each expression by applying the exponent rules. a) (–8)⁻²   = 1 / ((–8)²)   = 1 / (64)   = 1/64 b) (–1/8)⁻²   = 1 / ((–1/8)²)   = 1 / (1/64)            [since (–1/8)² = 1/64]   = 64 c) –8⁻² Note: This is interpreted as –(8⁻²).   8⁻² = 1/(8²) = 1/64   Thus, –8⁻² = –1/64 d) –((1/8)⁻²)   = –(8²)           [since (1/8)⁻² = 8²]   = –64 Final Answers: a) 1/64   b) 64   c) –1/64   d) –64

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Sure! Let's simplify each expression step by step. a) \( (-8)^{-2} \): Using the property of exponents that states \( a^{-n} = \frac{1}{a^n} \): \[ (-8)^{-2} = \frac{1}{(-8)^2} = \frac{1}{64} = \frac{1}{64} \] b) \( \left(-\frac{1}{8}\right)^{-2} \): Again applying the property of negative exponents: \[ \left(-\frac{1}{8}\right)^{-2} = \frac{1}{\left(-\frac{1}{8}\right)^2} = \frac{1}{\frac{1}{64}} = 64 \] c) \( -8^{-2} \): Using the exponent rule: \[ -8^{-2} = -\frac{1}{8^2} = -\frac{1}{64} \] d) \( -\left(\frac{1}{8}\right)^{-2} \): Applying the same rule for negative exponents: \[ -\left(\frac{1}{8}\right)^{-2} = -\frac{1}{\left(\frac{1}{8}\right)^2} = -\frac{1}{\frac{1}{64}} = -64 \] So the simplified answers are: a) \( \frac{1}{64} \) b) \( 64 \) c) \( -\frac{1}{64} \) d) \( -64 \)

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Algebra Mexico Feb 26, 2025
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