सरल करें: `sqrt([(12.1)^(2)-(8.1)^(2)]-:[(0.25)^(2)+(0.25)(19.95)])`

Options

A. 1
B. 2
C. 3
D. 4

Answer

D

Explanation

According to the question
` sqrt([(12.1)^(2)-(8.1)^(2)]-:[(0.25)^(2)+(0.25)(19.95)])`
`(sqrt(((12.1)+8.1)(12.1-8.1))/((0.25)^(2)+(0.25)(19.95)))`
`:.(a^(2)-b^(2))=(a+b)(a-b)`
`impliessqrt((20.2xx4)/(0.25[0.25+19.95]))`
`impliessqrt((20.2xx4)/(0.25xx20.2))`
`implies sqrt((4xx100)/25)`
`implies (2xx10)/5=4`