Question

If x=5-root21/2 , find x+1/x = ?​

Answer 1

THANKS FOR ASKING

Answer:

if X = 5-✓21/2

then put this value in x + 1/x

• 5-✓21/2+1 / 2
• 6 - ✓21/2 / 2
• 12-✓21 / 4 is your answer mate ....
• $\frac{12 - \sqrt{21} }{4}$