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Ch. R - Review of Basic Concepts
Lial - College Algebra 13th Edition
Lial13th EditionCollege AlgebraISBN: 9780136881063당신이 사용하는 게 아니라요?교과서 변경
1장, 문제 74

Simplify each radical. Assume all variables represent positive real numbers. ∛250

검증된 단계별 안내
1
Recognize that the problem asks to simplify the cube root of 250, written as \(\sqrt[3]{250}\).
Factor 250 into its prime factors: \(250 = 2 \times 5^3\).
Rewrite the cube root using the prime factorization: \(\sqrt[3]{2 \times 5^3}\).
Use the property of radicals that \(\sqrt[3]{a \times b} = \sqrt[3]{a} \times \sqrt[3]{b}\) to separate the factors: \(\sqrt[3]{2} \times \sqrt[3]{5^3}\).
Simplify \(\sqrt[3]{5^3}\) to 5, since the cube root and the cube cancel each other out, leaving the expression as \(5 \times \sqrt[3]{2}\).

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주요 개념

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

Simplifying Radicals

Simplifying radicals involves expressing the radical in its simplest form by factoring out perfect powers. For cube roots, this means identifying factors that are perfect cubes and separating them from the radical to simplify the expression.
추천 영상:
5:48
Adding & Subtracting Unlike Radicals by Simplifying

Prime Factorization

Prime factorization is breaking down a number into its prime factors. This helps in identifying perfect cubes within the number, which can be taken out of the cube root to simplify the radical.
추천 영상:
07:30
Introduction to Factoring Polynomials

Properties of Cube Roots

The cube root of a product equals the product of the cube roots: ∛(a·b) = ∛a · ∛b. This property allows us to separate the radicand into factors, simplify perfect cubes, and rewrite the expression in a simpler form.
추천 영상:
02:20
Imaginary Roots with the Square Root Property