1) x²-7x+12=0
х1 + х2 = 7
х1 * х2 = 12
х1 = 4
х2 = 3
2) х²+11х-12 = 0
х1 + х2 = -11
х1 * х2 = -12
х1 = -12
х2 = 1
1) x^2 - 7x + 12 = 0
по т. Виета
x1 + x2 = 7 x1 = 4
x1 * x2 = 12 → x2 = 3
2) x^2 + 11x - 12 = 0
x1 + x2 = - 11 x1 = - 12
x1 * x2 = - 12 → x2 = 1
1) x²-7x+12=0
х1 + х2 = 7
х1 * х2 = 12
х1 = 4
х2 = 3
2) х²+11х-12 = 0
х1 + х2 = -11
х1 * х2 = -12
х1 = -12
х2 = 1
1) x^2 - 7x + 12 = 0
по т. Виета
x1 + x2 = 7 x1 = 4
x1 * x2 = 12 → x2 = 3
2) x^2 + 11x - 12 = 0
по т. Виета
x1 + x2 = - 11 x1 = - 12
x1 * x2 = - 12 → x2 = 1