Matrices

Question 1

How do you solve a system using matrices?

Answer 1

matrix form of the system AX = B –> A is the coefficient matrix, X is the variables matrix, and B is the constant matrix. If you put B onto another column of A and then convert to reduced row echelon form, you get the solutions on the right side.

Question 2

If you have two matrices of the same size and there are variables in there, how do you solve for them?

Answer 2

Set the corresponding entries equal.

Question 3

What is the determinant of a 2x2 square matrix?

Answer 3

ad-bc

Question 4

When can you not create an inverse of a square matrix?

Answer 4

When the determinant is = to 0