Linear Algebra

3. A Square matrix is called_____matrix if all the non-diagonal elements are zero
4. Find to x=?[1-103][01-21][001-1]
8. ______ is a branch of mathematics rich in theory and applications
9. A Square matrix has ____ if and only if A is non singular
11. Horizontal lines in a matrix_____
12. If m=n this matrix called a_____matrix
13. _____are what remains often removal of a row and column from a matrix

1. A matrix whose determinate is zero_____
2. A rectougular array of quantites or expressions in rows and columns that is treated as a single entity and manipulated according to particular rules____
5. solve this problem. Find the determinate A=[231][331][241] =?
6. Main diagonal should be 1 and those below should be_____
7. The menas to change rows and colums
10. Two system of linear of linear equations are called ______ if they have pricisely the same solution set