Question

Giải giúp em với ạkk

Answer 1

`a. sqrt{1/((2-sqrt6)^2)}-sqrt{1/((2+sqrt6)^2)}`
`= 1/(|2-sqrt6|)-1/(|2+sqrt6|)`
`= 1/(sqrt6-2)-1/(sqrt6+2)`
`= (sqrt6+2-sqrt6+2)`
`= 4`
`b. sqrt{(sqrt2-sqrt3)^2}+sqrt18`
`= |sqrt2-sqrt3|+3sqrt2`
`= sqrt3-sqrt2+3sqrt2`
`= sqrt3+2sqrt2`
`c. 3sqrt2-4sqrt18+2sqrt32-sqrt50`
`= 3sqrt2-12sqrt2+8sqrt2-5sqrt2`
`= -6sqrt2`