1)660:30=22; 2)51500:50=1030;
3)5400:200=207; 4)241600:800=302.
1)x1+x2=-8 U x1*x2=7
x1=-7 U x2=-1
2)x1+x2=5-√3 U x1*x2=-5√3
x1=5 U x2=-√3
3)x1+x2=8-√15 U x1*x2=15-5√15
x1=3-√15 U x2=5
1) 3 1/4 * 8 = 13/4 * 8 = 104 / 8 = 13
2) 5 1/3 * 6 = 16/3 * 6 = 78 / 3 = 26
3) 4 * 1 1/2 = 4 * 3/2 = 12/2 = 6
4) 7 * 1 1/3 = 7 * 4/3 = 28 / 3 = 9 1/3
5) 2 3/8 *6 = 19/8 * 6 = 114/8 = 14 2/8
6) 1 3/4 *2 = 7/4 * 2 = 14/4 = 7/2 = 3 1/2
7) 3 * 2 1/9 = 3 * 19/9 = 57/9 = 6 3/9
8) 8 * 3 1/2 = 8 * 7/2 = 56/2 = 28