Sagot :
Bonjour
Réduire :
a. X² = irréductible
b. (x+3)² + x² = x² + 6x + 9 + x² = 2x² + 6x + 9
c. (x-1) (x-2)(x-4)
= (x² - 2x - x + 2) (x - 4)
= x³ - 4x² - 2x² + 8x - x² + 4x + 2x - 8
= x³ - 7x² + 14x - 8
d. 2x² - 8x+15 = irréductible
e. (x+ 5)(x-3) = x² - 3x + 5x - 15 = x² + 2x - 15.
Bonjour,
Réduire:
A. x² = x²
b. (x+3) ² + x²=x²+3x+3x+9+x²= 2x²+6x+9
c. (x-1) (x-2)(x-4) = (x-1)(x²-2x-4x+8)= ( x-1)(x²-6x+8)
= x³-6x²+8x-x²+6x-8= x³-7x²+14x-8
d. 2x² - 8x+15 = 2x²-8x+15
e. (x+ 5)(x-3) = x²+5x-3x-15= x²+2x-15