2х³+mx²+13x+n=0
m,n,x=?
x1=2
x2=3
-------
x1 = 2
2*2³ + m*2² + 13*2 + n = 0
16 + 4m + 26 + n = 0
4m + n = - 42
x2 = 3
2*3³ + m*3² + 13*3 + n = 0
54 + 9m + 39 + n = 0
9m + n = -93
5m = -51
m = -10.2
4*(-10.2) + n = -42
n = -1.2
2(x - 2)(x - 3)(x - 0.1) = 0
x3 = 0.1
m,n,x= -10.2, -1.2, 0.1
2х³+mx²+13x+n=0
m,n,x=?
x1=2
x2=3
-------
x1 = 2
2*2³ + m*2² + 13*2 + n = 0
16 + 4m + 26 + n = 0
4m + n = - 42
x2 = 3
2*3³ + m*3² + 13*3 + n = 0
54 + 9m + 39 + n = 0
9m + n = -93
5m = -51
m = -10.2
4*(-10.2) + n = -42
n = -1.2
2(x - 2)(x - 3)(x - 0.1) = 0
x3 = 0.1
m,n,x= -10.2, -1.2, 0.1