Question

d) x^2= x^5

Answer 1

`x^2 =x^5`

`=> x^2 -x^5 =0`

`<=> x^2 ( 1 -x^3 ) =0`

`<=>[ (x^2 =0 ),(1-x^3=0):}`

`<=>[(x=0),(x^3 =1):}`

`<=>[(x=0),(x=1):}`

Vậy `x in {0;1}`

Answer 2

`x^2=x^5`

`x^2-x^5=0`

`x^2 . (1-x^3)=0`

`=>x^2=0`

`x = 0`

`=> 1-x^3=0`

`x^3=1-0`

`x^3=1`

`x^3=1^3`

`=> x=1`

Vậy `x={0;1}`