Question

Matrix A has x rows and x+5columns.Matrix
B has y rows and 11 - y columns. If AB and BA
both exists then the value of x and y are
respectively​

Answer 1

For existence of both matrices, number of rows of

matrix A = number of columns of matrix B and number of rows of matrix B = number of columns of matrix A  

i.e., x = 11 - y  and y = x + 5  

Solving above equations, we get  x = 8 and y = 3.

@GaVyA