Có ai giải giúp được k aaaaa

`a)x^2-4x+4`

`=x^2-2*x*2+2^2`

`=(x-2)^2`

`b)x^2-6x+9`

`=x^2-2*x*3+3^2`

`=(x-3)^2`

`c)x^2+25+10x`

`=x^2+10x+25`

`=x^2+2*x*5+5^2`

`=(x+5)^2`

`d)x^2-1/4y^2`

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

`=(x-1/2y)(x+1/2y)`

`e)x^3+3x^2+3x+1`

`=x^3+3*x^2*1+3*x*1^2+1^3`

`=(x+1)^3`

`f)x^3-6x^2+12x-8`

`=x^3-3*x^2*2+3*x*2^2-2^3`

`=(x-2)^3` 

`g)8x^3+12x^2+6x+1`

`=(2x)^3+3*(2x)^2*1+3*2x*1^2+1^3`

`=(2x+1)^3`

`h)x^3-3/2x^2+3/4x-1/8`

`=x^3-3*x^2*1/2+3*x*(1/2)^2-(1/2)^3`

`=(x-1/2)^3`

`i)x^3-9x^2+27x-27`

`=x^3-3*x^2*3+3*x*3^2-3^3`

`=(x-3)^3`

`k)27x^3+27x^2+9x+1`

`=(3x)^2+3*(3x)^2*1+3*3x*1^2+1^3`

`=(3x+1)^3`

`m)x^3-x^2+1/3x-1/27`

`=x^3-3*x^2*1/3+3*x*(1/3)^2-(1/3)^3`

`=(x-1/3)^3`

`n)4x^2+1-4x`

`=(2x)^2-2*2x*1+1^2`

`=(2x-1)^2`

`o)9x^2-4`

`=(3x)^2-2^2`

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

`p)1/4x^2-25`

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

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

`q)1/4x^2-9y^2`

`=(1/2x)^2-(3y)^2`

`=(1/2x-3y)(1/2x+3y)`

`r)x^2-(2x+1)^2`

`=(x-2x-1)(x+2x+1)`

`=(-1-x)(3x+1)`