Evaluate each expression. (-2)5

Ch. R - Review of Basic Concepts

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Lial 13th Edition

Ch. R - Review of Basic Concepts

문제 86

1장, 문제 86

Evaluate each expression. (-2)⁵

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Identify the base and the exponent in the expression \((-2)^5\). Here, the base is \(-2\) and the exponent is \(5\).

Recall that an exponent indicates how many times the base is multiplied by itself. So, \((-2)^5\) means \((-2) \times (-2) \times (-2) \times (-2) \times (-2)\).

Multiply the base step-by-step, keeping track of the sign: multiply the first two \(-2\)s, then multiply the result by the next \(-2\), and so on until all five factors are multiplied.

Remember that multiplying two negative numbers results in a positive number, and multiplying a positive number by a negative number results in a negative number. Use this rule to determine the sign of the final product.

After completing the multiplication, you will have the value of \((-2)^5\). This is the evaluated result of the expression.

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주요 개념

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Exponents and Powers

An exponent indicates how many times a base number is multiplied by itself. For example, in (-2)^5, the base is -2 and the exponent 5 means multiplying -2 by itself five times.

Negative Base with Exponents

When a negative number is raised to a power, the sign of the result depends on whether the exponent is even or odd. An odd exponent keeps the result negative, while an even exponent makes it positive.

Order of Operations and Parentheses

Parentheses indicate that the negative sign is part of the base. Without parentheses, the exponent applies only to the number, not the negative sign. Here, (-2)^5 means the entire -2 is raised to the fifth power.