Question

Cho em cách là chi tiết với ạ

 

 

Answer 1

`2.(x-1)^2 = 8`

`(x-1)^2 = 8:2`

`(x-1)^2 = 4`

`(x-1)^2 =`\(\left(\pm2\right)^2\)

`@Th1:`

`x-1=2`

`x=2+1`

`x=3`

`@Th2:`

`x-1=-2`

`x=-2+1`

`x=-1`

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`(2x+1)^3 = 125`

`(2x+1)63 = 5^3`

`=> 2x+1=5`

`2x=5-1`

`2x=4`

`x=4:2`

`x=2`

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`(x-2)^5 = 243`

`(x-2)^5 = 3^5`

`=> x-2=3`

`x=3+2`

`x=5`