Pls help me with 11th and 12th questions..with explanation:)
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✅✅HEY HOPE THIS HELPS YOU.
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Answer:
361/400 and 9.61
Step-by-step explanation:
19/20
19 can be written as 20-1
(20-1)²=20²+1²-2*20*1 = 400 + 1 -40 = 361
(19/20)²=361/400
3.1
can be written as 31/10
31=30+1
31²=(30²+1+2*30*1) = 900+1+60=961
(31/10)²= 961/100 = 9.61
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