WEBVTT 00:00:01.010 --> 00:00:04.520 Welkom bij de presentatie over kwadratische vergelijkingen. 00:00:04.520 --> 00:00:06.730 Kwadratische vergelijking klinkt 00:00:06.730 --> 00:00:07.810 heel moeilijk 00:00:07.810 --> 00:00:09.930 En wanneer je voor het eerst een kwadratische vergelijking ziet, 00:00:09.930 --> 00:00:11.590 denk je: het klinkt niet alleen ingewikkeld, 00:00:11.590 --> 00:00:13.110 maar het is ook ingewikkeld. 00:00:13.110 --> 00:00:14.930 Maar hopelijk vind je het na deze presentatie 00:00:14.930 --> 00:00:16.580 niet zo moeilijk meer 00:00:16.580 --> 00:00:19.040 En in een latere presentatie zal ik je laten zien 00:00:19.040 --> 00:00:21.300 hoe men eraan komt. 00:00:21.300 --> 00:00:24.810 Over het algemeen, heb je al geleerd hoe je een 00:00:24.810 --> 00:00:25.810 tweedegraadsvergelijking moet ontbinden in factoren. 00:00:25.810 --> 00:00:30.910 Je hebt geleerd dat als je bijvoorbeeld deze vergelijking hebt: 00:00:30.910 --> 00:00:40.340 x kwadraat min x min 6 is 0 00:00:40.340 --> 00:00:42.970 x kwadraat min x min 6 is 0 00:00:42.970 --> 00:00:48.720 Dat je dat kunt ontbinden in factoren als x min 3 00:00:48.720 --> 00:00:52.210 en x plus 2 is 0 00:00:52.210 --> 00:00:54.955 Wat betekent dat of x min 3 is 0 of 00:00:54.955 --> 00:00:57.073 x plus 2 is 0 00:00:57.073 --> 00:01:03.512 00:01:03.512 --> 00:01:08.500 00:01:08.500 --> 00:01:17.980 00:01:17.980 --> 00:01:26.150 00:01:26.150 --> 00:01:28.760 00:01:28.760 --> 00:01:32.670 00:01:32.670 --> 00:01:34.780 00:01:34.780 --> 00:01:36.270 00:01:36.270 --> 00:01:40.430 00:01:40.430 --> 00:01:42.380 00:01:42.380 --> 00:01:50.130 00:01:50.130 --> 00:01:52.900 00:01:52.900 --> 00:01:57.150 00:02:00.030 --> 00:02:03.150 00:02:03.150 --> 00:02:05.110 00:02:05.110 --> 00:02:07.800 00:02:07.800 --> 00:02:11.520 00:02:11.520 --> 00:02:14.960 00:02:14.960 --> 00:02:16.600 00:02:16.600 --> 00:02:17.870 00:02:17.870 --> 00:02:19.160 00:02:19.160 --> 00:02:21.510 00:02:21.510 --> 00:02:23.420 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