Rut gon bieu thuc , em cam on

Đáp án + Giải thích các bước giải:

`\sqrt3-1/3 \sqrt(27)+2\sqrt(507) `

`= \sqrt3 -1/3 \sqrt(9.3)+2\sqrt(169 .3)`

`= \sqrt3 - 1/3 .3\sqrt3+ 2.13\sqrt3`

`= \sqrt3-\sqrt3+26\sqrt3`

`= 26\sqrt3`

`d, -\sqrt(36b)- 1/3\sqrt(54b)+1/5 \sqrt(150b) (b>=0)`

`= -\sqrt(6^2 .b)-1/3\sqrt(9.6b)+1/5 \sqrt(25 .6b)`

`= -6\sqrt(b)-1/3 .3\sqrt(6b)+1/5 .5\sqrt(6b)`

`= -6\sqrtb -\sqrt(6b)+\sqrt(6b)`

`= -6\sqrtb`