Phân tích nhân tử
a) x^2-2x+1
b)3x^3-10x^2+25x
c)(3x-3)^2-(x-1)^2
d)6x^2-11x+3
e)4x^2+16x-9
f)x^4+64
g)4x^4+y^4+1
h)x^2+6x-y^2+9
i)x^3+2x-3
k)x^3-7x+6
b)3x^3-10x^2+25x
c)(3x-3)^2-(x-1)^2
d)6x^2-11x+3
e)4x^2+16x-9
f)x^4+64
g)4x^4+y^4+1
h)x^2+6x-y^2+9
i)x^3+2x-3
k)x^3-7x+6