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

What is the HCF of 72 and 120?

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What is the square root of 121?

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What is the greatest common divisor (GCD) of 36 and 48?

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If a cone has a radius of 5 cm and a height of 12 cm, what is its slant height?

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If sin(θ) = 3/5 and θ is an acute angle, what is tan(θ)?

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The probability of rolling a sum of 7 with two dice is:

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If 3x = 81, what is the value of x?

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If a:b = 7:9 and b:c = 5:6, what is a:c?

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What is the sum of the first 20 odd numbers?

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If a+b = 10 and ab = 21, what is the value of a^3 + b^3?

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