Question

if x = 2 - root 5 / 2 + root 5 and y = 2 + root 5 / 2 - root 5 , find the value of x²-y² ​

Answer 1

Step-by-step explanation:

Paper is made of fibers, and there are little pockets of air between those fibers. When oil, grease, or fat comes in contact with paper, tiny droplets of it fill all the little gaps between the fibers of the paper.