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(Solved): Use Gaussian elimination with partial pivoting and three-digit rounding to solve the linear system ...
Use Gaussian elimination with partial pivoting and three-digit rounding to solve the linear system \[ \begin{array}{l} 3.12 x-y+1.35 z=-120 \\ -4.15 x+1.01 y+z=100 \end{array} \] \[ x+y+z=-130 \] Then \( x+y-z= \) a. \( -75.2 \) b. \( -74.2 \) c. \( -74 \) d. \( -732 \) e. 74
Expert Answer
from the given data we have to covert the equation into the augmented matrix is [3.12?11.35?120?4.151.011100111?130] R2?R2+1.33R1 [3.12?11.35?1200?0.3