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Class 9 Mathematics Exploring Algebraic Identities Algebraic identitiesExpert

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If (t-\frac{1}{t}=6), what is (t^2+\frac{1}{t^2})?

Answer and explanation

Correct answer: (38)

On squaring, (t^2-2+\frac{1}{t^2}=36), so the value is (38). Exam tip: the square of a difference gives (-2).

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Reciprocal Expression Minus Square Identity Algebraic Identities Exploring Algebraic Identities Mathematics Class 9 Mcq

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