Question

x³ + 2x² - 4x -8

Answer 1

x3 + 2x2 - 4x -8

=>x²(x+2)-4(x+2)

=>(x+2)(x²-4)

=>(x+2)(x-2)(x+2)

=>(x+2)²(x-2)

Chúc bạn làm tốt

Answer 2

\(x^3+2x^2-4x-8\)

\(=\left(x^3+2x^2\right)-\left(4x+8\right)\)

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

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

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

\(=\left(x+2\right)^2.\left(x-2\right)\)

Answer 3

x³ + 2x² - 4x -8

= \(\left(x^3+2x^2\right)-\left(4x+8\right)\)

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

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

= \(\left(x^2-2^2\right).\left(x+2\right)\)

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

= \(\left(x-2\right).\left(x+2\right)^2\)