how to begin to find a matrix that is 2x2 for this question.
Find an explicit description of Nul A by listing vectors that span the null space.
Assume that A is row equivalent to B. Find bases for Nul A and Col A.
The reduced row echelon form of the augmented matrix of a system of linear equations is given. Tell whether the system has one solution, no solution, or infinitely many solutions. Write the solutions or, if there is no solution, say the system is inconsistent.
Solve the following pair of linear equations by the elimination method and the substitution method: