Question

Решите через теоремы Виета
x(2)+10x-11=0
X(2)-3x-4=0
X(2)+12-13=0

Answer 1

1)

x1 + x2 = -10

x1 * x2 = -11

x1=-11; x2=1

2)

x1+x2=3

x1*x2=-4

x1=4; x2=-1

3)

x1+x2=-12

x1*x2=-13

x1=-12; x2=-1