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Which of the following expressions can be identified using the identity for the difference of two squares?
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Answer and explanation
Correct answer: \(x^2-25\)
Since \(x^2-25=x^2-5^2\), use \(a^2-b^2=(a-b)(a+b)\). \(x^2+25\) is a sum, not a difference. Exam tip: look for a minus sign between square terms.
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What is the correct answer to this question?
\(x^2-25\)
Why is this the correct answer?
Since \(x^2-25=x^2-5^2\), use \(a^2-b^2=(a-b)(a+b)\). \(x^2+25\) is a sum, not a difference. Exam tip: look for a minus sign between square terms.
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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