Question

x³+2x=0

8x(x-2017)-2x+4034=0

Answer 1

x³ + 2x = 0

x(x² + 2) = 0

x = 0 hoặc x² + 2 = 0

*) x² + 2 = 0

x² = -2 (vô lí)

Vậy x = 0

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8x(x - 2017) - 2x + 4034) = 0

8x(x - 2017) - 2(x - 2017) = 0

(x - 2017)(8x - 2) = 0

x - 2017 = 0 hoặc 8x - 2 = 0

*) x - 2017 = 0

x = 2017

*) 8x - 2 = 0

8x = 2

x = 1/4

Vậy x = 1/4; x = 2017

Answer 2

1)x^3+2x=0

<=>x(x^2+2)=0

<=>x^2=-2(vô lý)

2)8x(x-2017)-2x+4034=0

<=>(x-2017)(8x-2)=0

<=>X=2017,x=1/4