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Ch. P - Fundamental Concepts of Algebra
Blitzer - College Algebra 8th Edition
Blitzer8th EditionCollege AlgebraISBN: 9780136970514Non è quello che usi tu?Cambia libro di testo
Capitolo 1, Problema 32

Find each product. (x+5)(x−5)

Guida verificata passo dopo passo
1
Recognize that the expression (x+5)(x-5) is a product of two binomials in the form of a difference of squares.
Recall the difference of squares formula: \(\\(a+b)(a-b) = a^2 - b^2\\)\).
Identify \(a = x\) and \(b = 5\) in the given expression.
Apply the formula by squaring each term: \(x^2\) and \$5^2$.
Write the product as \(x^2 - 25\).

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Binomial Expressions

A binomial is a polynomial with exactly two terms, such as (x + 5) or (x - 5). Understanding binomials is essential because the problem involves multiplying two binomials, which requires applying specific algebraic rules.
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Multiplying two binomials involves using the distributive property (FOIL method) to multiply each term in the first binomial by each term in the second. This process expands the expression into a polynomial.
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The expression (x + 5)(x - 5) is a classic example of the difference of squares, which states that (a + b)(a - b) = a² - b². Recognizing this pattern simplifies multiplication and helps quickly find the product.
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