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x^2(x-3)-9(x-1)^2(x-3) svp​

Répondre :

Bonsoir;

x²(x-3)-9(x-1)²(x-3)

= x³ -3x² -9( x² -2x+9) ( x-3)

= x ³ -3x² - (9x² +18x -81)( x-3)

= -3x² -9x³ +18x² -81x +27x² - 54x - 243

= - 8x³ +41x² - 135x -243