Use Matrices and Gaussian Elimination to Solve Systems
-$$\begin{aligned}
x + y + z & = 2 \
x - y + 5 z & = - 4 \
2 x + y + z & = 7
\end{aligned}$$
A) $\{ ( 5 , - 1 , - 2 ) \}$
B) $\{ ( 5 , - 2 , - 1 ) \}$
C) $\{ ( - 2 , - 1,5 ) \}$
D) $\{ ( - 2,5 , - 1 ) \}$

Question

Quizplus · Accepted Answer

The Answer is A

Use Matrices and Gaussian Elimination to Solve Systems - x+y+z=2x−y+5z=−42x+y+z=7\begin{aligned}x + y + z & = 2 \\x - y + 5 z & = - 4 \\2 x + y + z & = 7\end{aligned}x+y+zx−y+5z2x+y+z​=2=−4=7​

Use Matrices and Gaussian Elimination to Solve Systems
- $\begin{aligned}x + y + z & = 2 \\x - y + 5 z & = - 4 \\2 x + y + z & = 7\end{aligned}$