Solve the system of equation by guess sidle method
8x1 + x2 + x3 = 8
2x1 + 4x2 + x3 = 4
x1 + 3x2 + 5x3 = 5

The solution is,

Step-by-step explanation:

Given equations are,

,

From the above equations,

First approximation,

Second approximation,

Third approximation,

Fourth approximation,

Fifth approximation,

Hence, by the Gauss Seidel method the solution of the given system is,

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

ab will be equal to