Giải thích các bước giải:
`1`
`(x-1)^2=25`
`=>`\(\left[ \begin{array}{l}(x-1)^2=5^2\\(x-1)^2=(-5)^2\end{array} \right.\)
`=>`\(\left[ \begin{array}{l}x-1=5\\x-1=-5\end{array} \right.\)
`=>`\(\left[ \begin{array}{l}x=5+1\\x=-5+1\end{array} \right.\)
`=>`\(\left[ \begin{array}{l}x=6\\x=-4\end{array} \right.\)
`2`
`(2 2/3+1 1/3):1/4-25`
`=(8/3+4/3):1/4-25`
`=12/3:1/4-25`
`=4:1/4-25`
`=4 . 4-25`
`=16-25`
`=-9`
`(10^3+(2,5)^3+5^3)/55`
`=(1000+15,625+125)/55`
`=(1140,625)/55`
`=1825/88`
