Question

Sarita donated some amount to a blind school. The
amount of donation is represented as Rs. (
2 +
1

2
) .Her
friends wanted to know the amount donated by her. But
she did not disclose the amount but just gave a hint that
the value of the expression ( +
1

) is Rs. 75.

Answer 1

Step-by-step explanation:

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if it's correct so

Answer 2

Concept:

Completing the square method is to create prefect squares on both sides, to solve a problem.

a²+b²+2ab=(a+b)²

Given:

x+1/x=75

Find:

x²+1/x²

Solution:

(x+1/x)²=75²

⇒x²+1/x²+2=5625

⇒x²+1/x²=5623

Hence, teh amount she donated  is Rs 5623

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