Question

(x+4)(x^2-4x+16)-x(x^2-2)=4

--< mk cần gấp>--

Answer 1

`(x+4)(x^2-4x+16)-x(x^2-2)=4`

`<=>x^3 +64-x^3+2x=4`

`<=>64+2x=4`

`<=>2x=4-64`

`<=>2x=-60`

`<=>x=-60:2`

`<=>x=-30`

Vậy `S={-30}`

Answer 2

`(x+4)(x^2-4x+16)-x(x^2-2)=4`

`<=>x^3+64-x^3+2x=4`

`<=>2x=-60`

`<=>x=-30`

vậy `S={-30}`

Answer 3

(x + 4) (x² - 4x + 16) - x (x² - 2) = 4

<=> x³ + 64 - x³ + 2x = 4

<=> 64 + 2x = 4

<=> 2x = 4 - 64

<=> 2x = - 60

<=> x = - 60 : 2

<=> x = - 30

vậy S = [ - 30 ]