Matrices

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Across
  1. 3. Numbers of variables of a matrix
  2. 4. vertical
  3. 5. size noted by rows and columns
  4. 8. Change sign in the middle of two terms
  5. 9. horizonal
Down
  1. 1. product of a real number and a matrix
  2. 2. Rational or irrational
  3. 6. same number of rows and columns
  4. 7. Eliminate a radical or an imaginary number from the denominator of an algebraic fraction.