Question

slove by gauss elimination method, using pivoting

2x + y + z =10

3x - 2y + 3z = 18

x + 4y + 9z  =16

 

Answer 1

$\left[\begin{array}{ccc}6&5&-12&-7\\7&5&-74&7\\30&-30&-114&14\end{array}\right]$