Question

[hoangtuvi]

c)2a²b + 4ab²- a²c + ac²- 4b²c + 2bc²- 4abc;

d) y(x - 2z)² + 8xyz + x(y - 2z)²- 2z(x + y)²

e) x⁵- 5x³ + 4x;

Answer 1

[Nguyễn Lê Phước Thịnh]

e: Ta có: \(x^5-5x^3+4x\)

\(=x\left(x^4-5x^2+4\right)\)

\(=x\left(x^2-1\right)\left(x^2-4\right)\)

\(=x\left(x-1\right)\left(x+1\right)\left(x-2\right)\left(x+2\right)\)