Вправи 888 - 1000 » 995 (в)

в) x2 – 8|x| + 12 = 0; 1) x < 0; x2 + 8x + 12 = 0; D = 82 – 4 • 1 • 12 = 64 – 48 = 16 = 42; x1 = (-8-4)/2 = (-12)/2 = –6; x2 = (-8+4)/2 = (-4)/2 = –2. 2) x ≥ 0; x2 – 8x + 12 = 0; D = (–8)2 – 4 • 1 • 12 = 64 – 48 = 16 = 42; x1 = (8-4)/2 = 4/2 = 2; x2 = (8+4)/2 = 12/2 = 6. Відповідь: –6; –2; 2; 6.