a) x²-2½x-6x+15=x²-8½x+15 b)⅜x²-3/16x-x+½=⅜x²-1 3/16x+½ c)⅕x²+3/10x-⅛x-3/16=⅕x²+12/40x-5/40x-3/16=⅕x²+7/40x-3/16 d)⅖x²-4/9x-3/10x+⅓=⅖x²-40/90x-27/90x+⅓=⅖x²-67/90+⅓
a)(½ x - 3)(2x - 5)= =x²-5/2x-6x+15= =x²-2½x-6x+15= =x²-8½x+15 b)(¾ x - 2)(½ x - ¼)= =¾*½x²-¾*¼x-2*½x+2*¼= =⅜x²-3/16x-x+½= =⅜x²-1i 3/16x+½ c)(⅖ x - ¼)(½ x + ¾)= =⅕x²+3/10x-⅛x-3/16= =⅕x²+12/40x-5/40x-3/16= =⅕x²+7/40x-3/16 d)(⅔ x - ½)(⅗ x - ⅔)= =⅖x²-4/9x-3/10x+⅓= =⅖x²-40/90x-27/90x+⅓= =⅖x²-67/90+⅓
a) (½ x - 3)(2x - 5)=x²-8,5x+15 b) (¾ x - 2)(½ x - ¼)=3/8x²-19/16x+1/2 c) (⅖ x - ¼)(½ x + ¾)=1/5x²+7/40x-3/16 d) (⅔ x - ½)(⅗ x - ⅔)=2/5x²-67/90+1/3
