` 242/363 + 1616/2121 = 2/7 xxy`

`2/7 xxy= 2/3 + 16/21`

`2/7 xxy= 14/21 +16/21`

`2/7 xxy= 30/21`

`y=10/7 : 2/7`

`y=10/7 xx 7/2`

`y=70/14`

`y=5`

__

` (y + 1/4) + (y + 1/16) + (y + 1/16) =2`

`(y+y+y)+(1/4 + 1/16+1/16)=2`

`3y + (4/16 +1/16 +1/16)=2`

`3y + 6/16=2`

`3y=2-6/16`

`3y= 32/16-6/16`

`3y= 26/16`

`y=26/16 : 3`

`y=26/48`

`y=13/24`

Ta có : `1 1/2= (1xx2+1)/2= 3/2 ; 1 1/9=(1xx9+1)/9=10/9`

`MSC : 72`

`1/4= (1xx18)/(4xx18)=18/72`

`3/2=(3xx36)/(2xx36)= 108/72`

`3/8=(3xx9)/(8xx9)= 27/72`

`10/9=(10xx8)/(9xx8)=80/72`

`->` Từ bé đến lớn là : `1/4;3/8;1 1/9;1 1/2`

đăng từng bài `1` á.

e chia từng bài ra nhe

\(\left(2+\sqrt{3}\right)^2+\left(2-\sqrt{3}\right)^2\\ =2^2+2\cdot2\cdot\sqrt{3}+\left(\sqrt{3}\right)^2+2^2-2\cdot2\cdot\sqrt{3}+\left(\sqrt{3}\right)^2\\ =4+4\sqrt{3}+3+4-4\sqrt{3}+3\\ =8+6=14\)