Question

x mũ 4 - 2x mũ 3 + 10x mũ 2 - 20x

Answer 1

\(x^4-2x^3+10x^2-20x\\ =x^3\left(x-2\right)+10x\left(x-2\right)\\ =\left(x^3-10x\right)\left(x-2\right)\\ =x\left(x^2-10\right)\left(x-2\right)\)

Answer 2

\(=x\left(x^2-10\right)\left(x-2\right)\)