Factor out the greatest common factor from each polynomial. See Example 1. (4z-5)(3z-2)-(3z-9)(3z-2)

검증된 단계별 안내

Identify the expression to factor: \( (4z - 5)(3z - 2) - (3z - 9)(3z - 2) \).

Notice that both terms contain the common binomial factor \( (3z - 2) \). This is the greatest common factor (GCF) of the two terms.

Factor out the GCF \( (3z - 2) \) from the entire expression, rewriting it as \( (3z - 2) \left[ (4z - 5) - (3z - 9) \right] \).

Simplify the expression inside the brackets by distributing the negative sign: \( (4z - 5) - (3z - 9) = 4z - 5 - 3z + 9 \).

Combine like terms inside the brackets to get \( (4z - 3z) + (-5 + 9) \), which simplifies to \( z + 4 \). So the factored form is \( (3z - 2)(z + 4) \).

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주요 개념

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

Greatest Common Factor (GCF)

The Greatest Common Factor is the largest expression that divides two or more terms or polynomials without leaving a remainder. Factoring out the GCF simplifies expressions and is the first step in many factoring problems. For example, in 6x and 9x², the GCF is 3x.

Distributive Property

The distributive property states that a(b + c) = ab + ac. It allows you to factor expressions by reversing distribution, extracting common factors from terms. In the given problem, recognizing common binomial factors helps in factoring the entire expression.

Factoring Polynomials

Factoring polynomials involves rewriting them as a product of simpler polynomials or factors. This process often starts by identifying and factoring out the GCF, then applying other methods if needed. It simplifies expressions and solves equations efficiently.