Can someone help me with this question please.

a. +3

b. -12a

Step-by-step explanation:

Here, we want to know the steps that are involved in those unoccupied segments

let’s start with the output

6a + 18

So what turned a to 6a + 18

Let’s call that output x

Let’s reverse the last step that multiplied that term and a

Thus (6a + 18)/6 = a + 3

Thus the x-term we are looking for is + 3 before the multiplication by 6

Now for the second part;

a * 4 -3 = -12a

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

16

step-by-step explanation: