Activitate 13 Efectuați: pe echipe 3a' 1 5 4a a + 3+ y² -2x² 1 2x-y b + a-16 a+2 a-2 a²+4 x' + y' x+y x²-xy+y 5 11 1 x²+xy+y2 x2-xy+y 5 с + 2x²-6x 3x-12x x²-7x+12 d + x³-y' x²+y' x²-y x+2x2-5x+1 2x-3 + 1 3x+7 2 e + 3 1 + (x-4)(x-9) x²-4 x2-9 (x-2)(x+3) (x-2)(x²-9)' 5x2-11x-13 + 12x(x+8)(4x-9) 12x(x+8) 4x2-9 (x+8)(4x2-9) 12x(x+8)(2x-3) 7x-1 x2-x-1 ​