1.

`33-4sqrt(35)` का वर्गमूल क्या है?A. `+-(sqrt(7)+sqrt(5))`B. `+-(sqrt(7)+2sqrt(5))`C. `+-(sqrt(7)-2sqrt(5))`D. `+-(2sqrt(7)-sqrt(5))`

Answer» Correct Answer - D
`33-4sqrt(35)`
`=33-2xx2sqrt(35)`
`=33-2xx2xxsqrt(7)xxsqrt(5)`
`=28+5-2xx2sqrt(7)xxsqrt(5)`
`=(2sqrt(7))^(2)+(sqrt(5))^(2)-2xx2sqrt(7)xxsqrt(5)`
`=(2sqrt(7)-sqrt(5))^(2)`
`sqrt(33-4sqrt(35))=+-sqrt((2sqrt(7)-sqrt(5))^(2))`
`= +-(2sqrt(7)-sqrt(5))`


Discussion

No Comment Found