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24-03-2016
Mathematics

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(9/10 - 2/5)-2/5(1/2) to the second power

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24-03-2016

(1/2) to the second power means (1/2)^2. So we need to solve.
(9/10 - 2/5)-2/5(1/2)^2=(9/10-4/10)-2*/5*4=5/10-2/20=10/20-2/20=8/20=4/10=0.4

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