Wzory Skróconego Mnożenia (Abbreviated Multiplication Formulas)
This page presents a comprehensive list of wzory skróconego mnożenia (abbreviated multiplication formulas), which are essential in algebraic calculations. These formulas are crucial for simplifying complex expressions and solving mathematical problems efficiently.
The page is divided into two main sections: formulas related to squares and formulas related to cubes. Each formula is clearly stated and numbered for easy reference.
Definition: Wzory skróconego mnożenia are algebraic formulas that allow for quick simplification of certain types of expressions without performing long multiplication or expansion.
In the first section, we find three fundamental formulas:
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Kwadrat sumy (Square of a sum): (a + b)² = a² + 2ab + b²
Example: For (5 + 3)², we get 5² + 2(5)(3) + 3² = 25 + 30 + 9 = 64
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Kwadrat różnicy (Square of a difference): (a - b)² = a² - 2ab + b²
Example: For (5 - 3)², we get 5² - 2(5)(3) + 3² = 25 - 30 + 9 = 4
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Różnica kwadratów (Difference of squares): (a - b)(a + b) = a² - b²
Example: For (5 - 3)(5 + 3), we get 5² - 3² = 25 - 9 = 16
The second section presents formulas related to cubes:
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Sześcian sumy (Cube of a sum): (a + b)³ = a³ + 3a²b + 3ab² + b³
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Sześcian różnicy (Cube of a difference): (a - b)³ = a³ - 3a²b + 3ab² - b³
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Różnica sześcianów (Difference of cubes): (a - b)(a² + ab + b²) = a³ - b³
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Suma sześcianów (Sum of cubes): (a + b)(a² - ab + b²) = a³ + b³
Highlight: These formulas are particularly useful in simplifying algebraic expressions, factoring polynomials, and solving equations. Mastering these wzory skróconego mnożenia can significantly improve a student's efficiency in algebraic manipulations.
Vocabulary:
- Kwadrat: Square
- Różnica: Difference
- Sześcian: Cube
- Suma: Sum
Understanding and applying these formulas correctly is crucial for success in algebra and higher-level mathematics. Students should practice using these formulas in various contexts to fully grasp their utility and power in mathematical problem-solving.
