Question

Raise to the power indicated and remove parentheses. $$(a x y)^{3}$$

Short answer

\((a x y)^3 = a^3 x^3 y^3\)

Step-by-step solution

Understand the Power of a Product Rule

The power of a product rule states that when raising a product to a power, you can distribute the exponent to each factor inside the parentheses. The expression \((a x y)^3\) means that each factor inside the parentheses, which are a, x, and y, will be raised to the third power.

Apply the Exponent to Each Factor

Applying the exponent 3 to each factor inside the parentheses, we get \(a^3\), \(x^3\), and \(y^3\).

Combine the Factors

After raising each factor to the power of 3, we simply multiply these terms together to get the final expanded form. The result is \(a^3x^3y^3\).

Key concepts

Exponentiation

Let's break down what exponentiation really is. At its core, exponentiation is a mathematical shorthand for multiplying a number by itself a certain number of times. When we have an expression like \(a^n\), it represents the number \(a\) multiplied by itself \(n\) times. For instance, \(2^3\) means \(2 \times 2 \times 2\), which equals 8. It's important to recognize that the base \(a\) remains constant while the exponent \(n\) dictates how many times this multiplication occurs.

When it comes to variables and algebra, exponentiation follows the same principles. If you have \(x^3\), you're simply multiplying \(x\) by itself three times, i.e., \(x \times x \times x\). The process helps condense lengthy repetitive multiplication, making complex calculations tidier and more manageable.

Algebraic Expressions

Algebraic expressions are combinations of variables, numbers, and at least one arithmetic operation. In our example \((ax)^3\), we see variables \(a\) and \(x\), and the arithmetic operation involved is exponentiation. The beauty of algebraic expressions lies in their generality; they can represent any number of specific quantities without being limited to a single numerical value.

Understanding algebraic expressions is crucial because they form the foundation of algebra and allow us to describe patterns, relationships and solve problems that have many or unknown quantities. By manipulating these expressions, such as expanding them by using exponentiation, we make it possible to solve for unknown values or simplify expressions for further analysis.

Distributive Property of Exponents

When you encounter an exponent that applies to multiple factors, as in our example \((axy)^3\), the distributive property of exponents allows you to apply the exponent to each factor individually. This rule lets us expand \((axy)^3\) into \(a^3\), \(x^3\), and \(y^3\), and then multiply them together. This property showcases that the process of exponentiation distributes over multiplication.

To illustrate, imagine you have three groups of \(axy\) standing together, and you raise this entire group to the third power. You are in essence raising each individual component within the group to the third power. This doesn't change the value of the expression but it changes its form, which can be useful in further calculations or when simplifying the expression.