Sagot :
Bonjour,
E = (3x+2)² - (5-2x)(3x+2)
E = 9x²+12x+4 -(15x+10-6x²-4x)
E = 9x²+12x+4-15x-10+6x²+4x=
E = 15x²+x-6
E= 9x^2 + 12x + 4 - (15x+10-6x^2-4x)
E = 9x^2 + 12x + 4 - 15x - 10 + 6x^2 + 4x
E = 15x^2 + x - 6
E= (3x+2)(3x+2-5x+2x)
E= (-6+2)^2 - (5+4)(-6+2)
E = -4^2 - (9-4)
E= 16 - (5)
E= 11
E = 9x^2 + 12x + 4 - 15x - 10 + 6x^2 + 4x
E = 15x^2 + x - 6
E= (3x+2)(3x+2-5x+2x)
E= (-6+2)^2 - (5+4)(-6+2)
E = -4^2 - (9-4)
E= 16 - (5)
E= 11