Question

If x=4-√15 find x² −1 over x²

Answer 1

Answer:

Step-by-step explanation:

x = 4 -√15

(4 -√15)² - 1/(4 -√15)²

16-15-8√15 - (4 +√15)²/(4 -√15)²(4 +√15)²

1-8√15 - (16+15+8√15)/(4²-√15²)²

1-8√15 - (31+8√15)/1

-32