Topic Details (Notes format)

How to Solve Quadratic Equations by Factoring

Subject: Mathematics

Book: Maths Mastery

Factoring is a more intuitive method for solving ax² + bx + c = 0 when the polynomial can be expressed as a product of two binomials. For instance, x² + 5x + 6 factors to (x + 2)(x + 3) = 0, giving solutions x = –2 or x = –3. The approach requires identifying two numbers that multiply to ac and add to b. While factoring is not always possible with neat integers, it’s efficient when applicable. This method is widely used in geometry, business break-even analyses, and logic puzzles. Practicing with different coefficients develops a keen sense for pattern recognition and polynomials.

Practice Questions

If the sum of the angles of a polygon is 1080°, how many sides does the polygon have?

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If x² - 9x + 18 = 0, what are the roots of the equation?

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If x^2 - 5x + 6 = 0, what are the roots?

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What is the sum of the first 10 positive even numbers?

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If 2x = 16, what is the value of x?

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What is the square root of 144?

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The sum of the squares of two consecutive integers is 145. What are the integers?

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If x + 1/x = 5, what is the value of x^2 + 1/x^2?

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A number is increased by 20% and then decreased by 10%. What is the net change?

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What is the sum of all odd numbers from 1 to 99?

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