Solution:
We are given that
Ballpoint pens cost $1.50 a dozen for the first 200 dozen a store buys from a wholesaler.
$1.25 a dozen for those bought in addition to the first 200 dozen.
we have been asked to find
If the store buys 250 dozen pens from the wholesaler, then what is the average cost of ballpoint pens per dozen.
Cost of first 200 dozens of pens
Cost of 50 dozens of pens
Total cost of 250 dozens of pens
Average cost per dozen
Answer:
The factor form of given expression is (x-4)(x-2i)(x+2i).
Step-by-step explanation:
The given expression is
It can be written as
According to the rational root theorem, all possible rational roots are in the form of
Where, a₀ is constant term and is leading coefficient.
Since the value of f(x) is 0 at x=4, therefore 4 is a root of the function and (x-4) is a factor of given expression.
Use synthetic method to find the remaining factors.
Therefore the factor form of given expression is (x-4)(x-2i)(x+2i).