Question

4.3.67

Solve using Gauss-Jordan elimination.

 x1 - x2 + x3 = -0.9

 -2x1 +5x2 + 5x3 + 4x4 = 2.1 

3x1 + 6x3 + 7x4 = - 4.7 

4x1 – 3x2 + 2x3 + 6x4 = -6.7 

Select the correct choice below and fill in the answer box(es) within your choice. 

4.3.47

Solve using Gauss-Jordan elimination 

3x1 + 3x2 - 7x3 = - 15 

4x1 + 18x2 - 43x3 = - 23 

x1 + 3x2 - 7x3 = -5 

Select the correct choice below and fill in the answer box(es) within your choice.

Answer 1

4.3.67

A. The unique solution is x1= -0.8 , x2= 0.3 , x3= 0.2 ,

x4= -0.5

4.3.47

A. The unique solution is x1= -5 , x2= 7 , x3= 3