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Grade 12Algebra

please help me with this sum of matrices.
please help me with this sum of matrices.please help me with this sum of matrices.

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Profile image of benjamin
10 Years agoGrade 12
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1 Answer

Profile image of Vikas TU
10 Years ago
Steps -------->
 
  1. First calculate the determinant of the matrix say, D
  2. Then calculate Dx determinant with first column replaceable with Xb.
  3. Similarly calculate Dy detreminant with second clumn replaceable with Xb
  4. And then Dz by replacing with third column replaceable with Xb. 
​if D =0 AND Dx Dy and Dz is non-zero then No- Solution.
if D is non- zero Unique soln.
if D = 0 Dx =0 Dy =0 and Dz =0
then infiniite solution.