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Which of the following expressions represents a difference of two perfect squares?
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Answer and explanation
Correct answer: \(p^2-q^2\)
In \(p^2-q^2\), both \(p^2\) and \(q^2\) are perfect squares and they are separated by subtraction, so it is a difference of squares. \(p^2+q^2\) has addition. Exam tip: look for “square minus square.”
Frequently asked questions
What is the correct answer to this question?
\(p^2-q^2\)
Why is this the correct answer?
In \(p^2-q^2\), both \(p^2\) and \(q^2\) are perfect squares and they are separated by subtraction, so it is a difference of squares. \(p^2+q^2\) has addition. Exam tip: look for “square minus square.”
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Exploring Algebraic Identities. Topic: Factorisation.
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