20. (3^2-2^2)/ (1/5)^2
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Step-by-step explanation:
(3^2-2^2)/ (1/5)^2
(3² - 2²) / (1/5)²
(9 - 4) / (1/25)
5 / (1/25)
(5×1)/25
5/25
1/5
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