In Exercises 85–96, simplify each algebraic expression. 5(3x+4)−4

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Distribute the 5 across the terms inside the parentheses. This means multiplying 5 by each term inside the parentheses: \(5 \cdot 3x\) and \(5 \cdot 4\).

Simplify the results of the distribution: \(5 \cdot 3x = 15x\) and \(5 \cdot 4 = 20\), so the expression becomes \(15x + 20 - 4\).

Combine like terms. In this case, combine the constants \(20\) and \(-4\) to simplify the expression further.

Write the simplified expression after combining the constants. The result will be in the form \(15x + c\), where \(c\) is the simplified constant term.

Verify that no further simplification is possible, ensuring the expression is in its simplest form.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Distributive Property

The Distributive Property states that a(b + c) = ab + ac. This property allows us to multiply a single term by each term within a parenthesis. In the given expression, applying the distributive property to 5(3x + 4) means multiplying 5 by both 3x and 4, which simplifies the expression.

Combining Like Terms

Combining like terms involves simplifying an expression by adding or subtracting terms that have the same variable raised to the same power. After distributing, the expression may contain terms that can be combined, such as constants or terms with the same variable, to further simplify the expression.

Order of Operations

The Order of Operations is a set of rules that dictates the sequence in which calculations should be performed to ensure consistent results. The acronym PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction) helps remember this order. In simplifying the expression, following this order is crucial to correctly evaluate and combine terms.