Topic Details (Notes format)

How to Factor the Difference of Squares

Subject: Mathematics

Book: Maths Mastery

A difference of squares takes the form a² – b² and factors into (a – b)(a + b). For example, x² – 9 becomes (x – 3)(x + 3). This factoring pattern simplifies advanced algebraic expressions, helps solve polynomial equations quickly, and appears often in geometry proofs or optimization tasks. Recognizing a² – b² is crucial in polynomial manipulation, partial fraction decomposition, and problem-solving across arithmetic, geometry, and calculus contexts, making it a powerful tool in your algebraic toolkit.

Practice Questions

What is the cube root of 729?

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What is the value of x if log(x) + log(4) = log(32)?

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If a = 5 and b = 12, what is the length of the hypotenuse of a right triangle?

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If 2x - 3 = 7, what is the value of x?

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If the radius of a circle is doubled, what happens to its area?

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A sum triples in 20 years at simple interest. What is the rate of interest per annum?

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If a+b = 10 and ab = 21, what is the value of (a-b)^2?

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If a number is divisible by 9, it is also divisible by which of the following?

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If x + y = 10 and xy = 21, what is the value of x³ + y³?

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

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