Câu a : \(x^2-4x+3=\left(x-1\right)\left(x-3\right)\)
Câu b : \(x^2+6xy+5y^2=\left(x+y\right)\left(x+5y\right)\)
Câu c : \(x^2+3x-18=\left(x-3\right)\left(x+6\right)\)
Câu d : \(8x^2+30xy+7y^2=\left(2x+7y\right)\left(4x+y\right)\)
Câu e : \(x^3-11x^2+30x=x\left(x-5\right)\left(x-6\right)\)
Câu f : \(x^3+8x^2y+15xy^2=\left(x+3y\right)\left(x^2+5xy\right)\)