a fost răspuns

Aratati ca :   - 2x² - 5x = (x-1)(x+2)(x-3)

Răspuns :

Madalinaaaaask
x³-2x²-5x+6=(x-1)(x+2)(x-3)⇒x³-2x²-5x+6=(x²+2x-x-2)(x-3)⇒ x³-2x²-5x+6=(x²+x-2)(x-3)⇒ x³-5x+6=x³-3x²+x²-3x-2x+6⇒ x³-2x²-5x+6=x³-2x²-5x+6