What is the following product?

(StartRoot 14 EndRoot minus StartRoot 3 EndRoot) (StartRoot 12 EndRoot + StartRoot 7 EndRoot)
2 StartRoot 42 EndRoot + 7 StartRoot 2 EndRoot minus 6 minus StartRoot 21 EndRoot
StartRoot 14 EndRoot minus 6 + StartRoot 7 EndRoot
StartRoot 26 Endroot + StartRoot 21 EndRoot minus StartRoot 15 EndRoot minus StartRoot 10 EndRoot
2 StartRoot 42 EndRoot minus StartRoot 21 EndRoot

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

i would say b) is your answer

sorry if im wrong

step-by-step explanation: