a) \(24x^2-4xy\)
\(=4x\left(6x-y\right)\)
b) \(5x^3-10x^2+5x-20xy^2\)
\(=5x\left(x^2-10x+5-20y^2\right)\)
nhầm câu b nha
\(5x^3-10x^2+5x-20xy^2\)
\(=5x\left(x^2-2x+1-\left(2y\right)^2\right)\)
\(=5x\left(\left(x-1\right)^2-\left(2y\right)^2\right)\)
\(=5x\left(x-1-2y\right)\left(x-1+2y\right)\)