Calcula: (2x3)5:(4x3)-(3x3)4 = = x x : − x3− x = x = x = Q(x)=−4x3+6x2-5x-6 P(x)=3x3-5x2+4x-2 x3+ x3+ x3+ P+Q? x2+ x2+ x2+ x+ x+ x+ Q(x)=−4x3+6x2-5x-6 P(x)=3x3-5x2+4x-2 x3+ x3+ x3+ P−Q? x2+ x2+ x2+ x+ x+ x+ x2+ x2+ 3x+5 x−3 x+ x x+ x3+ x3+ x2+3x+9 x2+ x2+ x2+ x−3 x+ x x+ x3+ x3+ 6x2+2x+4 x2+ x2+ x2+ 5x−3 x+ x x+ x5+ x5+ x4+ x4+ x4+ 3x3+5x2+2x+4 x3+ x3+ x3+ x3+ x2+6x+3 x2+ x2+ x2 x2+ x+ x x+ x5+ x5+ x4+ x4+ x4+ 4x3-5x2+4x-6 x3+ x3+ x3+ x3+ 2x2-4x+3 x2+ x2+ x2 x2+ x+ x x+ Aquí tens unes identitats notables. Calcula-les: (3x−5)2= (3x+2)(3x−2)= (5x−6)(5x+6)= (2x+3)2= x2+ x2− x2− x2− x+ x+ Aquí n'hi ha unes altres. Calcula-les: (5x2+4)2= (2x3−7)2= (4x4+6)(4x4−6)= (9x2−8)(9x2+8)= x4+ x6− x2− x2− x2+ x3+ |