Page 241 - Demo

237 f i x = 4 ii 1 iii (4; 0)3 ajA bjF cjD djC ejE fjB4 a x = 0; x = 7 e x = 0; x = 4 h x = 0; x = 0,65 b x = 1; x = 2 d x = 4; x = 3 g x = 5; x = 36 a x = 2 b x = o4 c x = o2 a x = 57 a x2 + 6x + 3 = (x + 3)2  6 b (0, 3) c (3, 6) e 2 rrënjë–2 –1 12 4 3 x –7–6–5–4 –3 –14213–2–3–4–5–6–70y8 a i y = (x + 1)2  4 ii (1, 4) iv 2 b i y = (x + 1)2 + 2 ii (1, 2) iv 0c i y = (x + 4)2  4 ii (4, 4) iv 2–1 2 0 1 3 4 5 x –3 –6 –5 –4 –3 –2 –1–2–3–412345678ydba cy 5 x2 + 2x − 3y 5 x2 + 2x + 3y 5 x2 + 8x + 12y 5 x2 − 6x + 120 2 4 x –6 –4 –2–2–4–6–8–10246810yhfecy 5 x2 + 5x − 3y 5 x2 − 6x + 9y 5 x2 + 3x + 72 4 6 8 10 x24–26810121416182022240yy 5 −x2 + 10x − 1*9 y = 3x2 + 6x  2 = 3(x + 1)2  5 b (0, 2) c (1, 5) d –5 5–55010xy*10 b2  4ac = 20 < 0. 20 nuk ekziston, prandaj funksioni nuk ka rrënjë.*11 b2  4ac = 100 > 0. Nga formula , del se funksioni ka dy rrënjë.*12 17 metra2.3Z1 a 1 2fitimi (lekë)çmimi i shitjes (qind lekë)3456 –112345–2–3–4–50 b 100 lekë ose 500 lekë c 300 lekë; 4 lekë2 a 22 500; 1 250 b 20 000 ose 25 0003 a largesa e hedhjes (m) lartësia (cm)2000 50400600800 b 676 cm c 50 m4 a 50 cm b 62,5 cm 5 a koha (s)lartësia (m) 2030100 1 23454050 b 44,1 m c 3 sekonda6 12345678 x –4–3–2–1–11234567–2–30y 7 –2–1 12 4 3 x –8–7–6–5–4–3 –1123459867–20y 8 1 rrënjë 9 a –4–3–2–1 1 2 x 3 5 4 6 7 8 10 9y–1123456–4–2–30 b x = 0,5 ose x = 7,5