You need to make sure all of the equations are proportional and if not than it isn’t.
Answer:4 (40+7). Hope this helps you!
A. The extra amount added to the selling price to arrive at the cost price
f (x) = x ^ 4-x ^ 3 + x ^ 2-x
For this case what we can do is graph the function and see the behavior of it.
We have then that the function grows upwards (see attached image)
It has two cutting points with the x axis in:
x = 0
x = 1
Therefore, the other roots of the polynomial are imaginary.
Answer: 2 x intercepts appear on the graph of this polynomial function