Answer:
pqr²+pr-rp²+rq²
Step-by-step explanation:
pq(r²+1)-r(p²+q²)
pqr²+pr-rp²+rq²
Three times the difference of a number and four.
or
Three times the quantity of four less than a number n.
Given :
Median salary of engineer , E = $55,000 .
Median salary of computer engineer , C = $52,000 .
To Find :
The total cost for a business to employ two engineers and three programmers for 1 year .
Solution :
Now , cost of paying two engineers .

Also , cost of paying three programmers .

Therefore , total cost for 1 year is
.
Hence , this is the required solution .