precal_answer_matrix - 1 Solve the system of equations by Gaussian elimination or Gauss-Jordan elimination method 3x y 2z = 1 a 2x 3y z = 3 2y z = 2 x

# precal_answer_matrix - 1 Solve the system of equations by...

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1. Solve the system of equations by Gaussian elimination or Gauss-Jordan elim-ination method.a.3x+y-2z=-1-2x+3y+z=-3x+2y-z=-2 c.2y+z=-1x+4y+z=1x-3y=2 d.7x-y-z=2-x+2z=55y-z=7
2. Given matrixAandB, findABandBA, if defined:
a. A = " 1 - 2 3 2 - 5 0 # B = - 3 7 2 2 5 - 4 Ans: AB = " 8 - 9 - 16 4 # BA = 11 - 29 - 9 6 - 14 6 - 3 10 15 b. A = " 8 - 5 - 3 3 11 5 # B = 12 - 6 - 4 5 11 - 7 0 3 - 1 0 - 3 - 2 Ans: AB = " 44 - 13 - 23 31 152 - 95 - 27 38 # BA is undefined. c. A = 3 - 6 11 7 8 B = h 6 - 1 - 7 10 4 i Ans: AB = 18 - 3 - 21 30 12 - 36 6 42 - 60 - 24 66 - 11 - 77 110 44 42 - 7 - 49 70 28 48 - 8 - 56 80 32 BA = h 49 i d. A = 12 3 - 9 - 3 - 8 10 - 4 3 2 B = 5 - 6 7 - 1 - 1 9 3 2 - 1
Ans: AB = 30 - 93 120 23 46 - 103 - 17 25 - 3 BA = 50 84 - 91 - 45 32 17 34 - 10 - 9 e. A = 7 13 11 - 1 5 - 12 8 0 0 B = 1 1 - 7 14 - 5 - 15 - 6 - 8 9 Ans: AB = 123 - 146 - 145 141 70 - 176 8 8 - 56 BA = - 50 18 - 1 - 17 157 214 38 - 118 30 f. A = 7 12 - 4 - 17 - 16 5 18 9 13 B = 20 18 7 3 - 9 11 12 0 0 Ans: AB = 128 18 181 - 328 - 162 - 295 543 243 225 BA = - 40 15 101 372 279 86 84 144 - 48 g. A = - 2 0 0 - 3 - 3 3 9 15 - 3 B = 2 7 2 - 20 19 8 6 - 4 - 2