Mn ơi giúp mình với ạ mình đang cần gấp ạ vote 5 sao

Đáp án:

`a) A = 2\sqrt{8}-5\sqrt{18}+4\sqrt{32}`

`= 2.2\sqrt{2}-5.3\sqrt{2}+4.4\sqrt{2}`

`= 4\sqrt{2}-15\sqrt{2}+16\sqrt{2}`

`= 5\sqrt{2}`

`b) B = \sqrt{4-2\sqrt{3}}-1/2\sqrt{12}`

`= \sqrt{(\sqrt{3}-1)^2}-1/2.2\sqrt{3}`

`= |\sqrt{3}-1| -\sqrt{3}`

`= \sqrt{3}-1-\sqrt{3}`

`=-1`

`c) (\sqrt{5}-\sqrt{2})^2+\sqrt{40}`

`= 5-2\sqrt{10}+2+2\sqrt{10}`

`= 7`

`d) D = 2\sqrt{48}+3\sqrt{75}-2\sqrt{108}`

`= 2.4\sqrt{3}+3.5\sqrt{3}-2.6\sqrt{3}`

`= 8\sqrt{3}+15\sqrt{3}-12\sqrt{3}`

`= 11\sqrt{3}`