Tìm X biết:

a/ 5x (x - 2000) – x + 2000 = 0

b/ x3 – 13x = 0

c/ 3x2 - 6x =0

d/ x(x- 5) +3(x-5)=0

e/9x2 – 4 =0

giúp mình vs thx mn

a) x2 - 4x + 4

b) x2 - 2

c) 1 - 8x3

d) x3 + 3x2 + 3x + 1

e) (x + y)2 - 9x

f)x²+6x+9

g)10x-25-x²

h)8x³-\(\dfrac{1}{8}\)

giúp em vs mn thx mn ạ

1/2x2 + 4x

2/15x3 + 5x2 - 10x

3) 5x2(x-2y) + 15x (x -2y)

4) 3(x - y) + 5x(y - x)

5/ 5x2 - 10x

6) 3x-6y

7)25x2+5x3+x2y

8)14x2y-21xy2+28x2y2

9)x(y-1)- y(y-1)

10) 10x(x-y)-8y(y-x)

giúp mình vs mn cảm ơn mn rất nhiều ạ

(2y+1) (1-2y)=

hiệu của a³-b³

help