Mọi người giúp mình với ạaaaaaaaaaa

Answer

`a, 1/4x^2 - 25`

`= (1/2x)^2 - 5^2`

`= (1/2x - 5) . (1/2x + 5)`

`b, x^3 - 27`

`= x^3 - 3^3`

`= (x - 3) . (x^2 + 3x + 9)`

`c, x^2 - 25xy`

`= x . (x - 25y)`

`d, 32x . (y + 1) - y - 1`

`= 32x . (y + 1) - (y + 1)`

`= (y + 1) . (32x - 1)`

`e, -2xy + 6x - 4`

`= -2 . (xy - 3x + 2)`

`f, 10x^2y^3 - 2xy^2 + xy`

`= xy . (10xy^2 - 2y + 1)`