Question

18. (1)( sqrt{41-sqrt{21+sqrt{19-sqrt{9}}}} )
( =sqrt{41-sqrt{21+sqrt{19-3}}} )
( (because sqrt{9}=3) )
( =sqrt{41-sqrt{21+sqrt{16}}} )
( =sqrt{41-sqrt{21+4}} )
( (because sqrt{16}=4) )
( =sqrt{41-sqrt{25}}=sqrt{41-5} )
( (because sqrt{25}=5) )
( =sqrt{36}=6 )
( (because sqrt{36}=6) )

# 18. Evaluate 141 – 21+ 119 - Jo (1) 6 (2) 4 (3) 2 (4) 8.

Solution