Which of the following systems is equivalent to the given syster
x-v= 2
x + = y=-3
2x - 3y = 6 and 2x + y = 6
6x - 3y = 6 and 2x + y = 10
2x - 3y = 6 and 2x + y = -6

the perimeter is increased by a factor of 2

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b