25% 6 divided by 24 will give you the percentage of copper in the bar
Answer:
The number
is added to the polynomial below to complete the square.
Step-by-step explanation:
Perfect square binomial:
A perfect square binomial is given by:

In this question:
We have that:

Since
, we have that:



Completing the square:
The term that completes the square is
. So

The number
is added to the polynomial below to complete the square.