Phân tích đa thức thành nhân tử
a. \(12x^3y-24x^2y^2+12xy^3\)
\(=12xy\left(x^2-2xy+y^2\right)\)
\(=12xy\left(x-y\right)^2\)
b. \(x^2-6x+xy-6y\)
\(=x\left(x-6\right)+y\left(x-6\right)\)
\(=\left(x+y\right)\left(x-6\right)\)
c. \(2x^2+2xy-x-y\)
\(=x\left(2x-1\right)+y\left(2x-1\right)\)
\(=\left(x+y\right)\left(2x-1\right)\)
d. \(x^3-3x^2+3x-1\)
\(=\left(x-1\right)^3\)
e. \(x^2-2xy-x^2-4y^2\)
\(=-2xy-4y^2\)
\(=-2y\left(x+2y\right)\)
g. \(x^2-2x+1-16\)
\(=\left(x-1\right)^2-4^2\)
\(=\left(x-1-4\right)\left(x-1+4\right)\)