The Area of an enclosure is X4 - 1. If it is divided into sections, each with an area of X2 - 1, how many sections are made?

Question

A. X2 - 2

B. X + 1

C. X2 + 1

D. X2

Answer 1

The number of sections will be x^4-1/x^2-1 Factor x^4-1 to (x^2+1)(x^2-1)

so we have (x^2 +1)(x^2-1)/(x^2-1)= x^2 +1. Choice C