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What will be the value of 25.7322-15.7322

214.64
314.64
414.64
412.64

Correct Answer: 414.64

Explanation:

Can be easily solved with following formula

$a 2 - b 2 = a - b \times a + b$
= (25.732 - 15.732 ) x (25.732 + 15.732)
=414.64

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