Diagonal Method to find the square of any number

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Diagonal Method to find the square of any number.

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CASE-STUDY 1 Sarita donated some amount to a blind school. The amount of...

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CASE-STUDY 1 Sarita donated some amount to a blind school. The amount of donation is represented by the expression ₹ (x² + (1/x²)) Her friends wanted to know the amount donated by her. She did not disclose the amont but gave a hint that the value of the expression x + 1/x is75. Based on the above information, answer the following questions: (i) Which mathematical concept is used in the above situation? (ii) Which algebraic identity is used to calculate the amount donated by Sarita? (iii) Find the amount donated by Sarita. OR Find the value (in Rs) x³ + 1/x³ class 9 maths chapter 2 polynomials case study-based question
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