Вправи 1001 - 1100 » 1093 (а)

1093. Побудуй графік функції. a) y = (x^2- x-12)/(x-4); x2 – x – 12 = (x – 4)(x + 3); x1 + x2 = 1; x1 • x2 = –12; x1 = 4; x2 = –3; y = (x^2- x-12)/(x-4) = ((x-4)(x+3))/(x-4) = x + 3; y = x + 3; x ≠ 4.