`sqrt((0.798)^(2)+0.404xx0.798xx(0.202)^(2))+1=?`

Options

A. 0
B. 2
C. 1
D. 0.404

Answer

B

Explanation

According to the question
`sqrt((0.798)^(2)+0.404x0.798+(0.202)^(2))+1=?`
`sqrt((0.798)^(2)+(0.202)^(2)+2xx0.202xx0.798)+1`
`impliessqrt((0.798+0.202)^(2))+1`
`[ :' (a+b)^(2)=a^(2)+b^(2)+2ab]`
`impliessqrt((1)^(2))+1implies1+1=2`