Question

If x=root(13)+2root(3),find the value of x-1/x

Answer 1

x=√13 +2√3
x-1=√13 +2√3 -1
x-1/x = (√13 +2√3 -1)/(√13 +2√3)=0.8586 (approximately)

Answer 2

X=√13+2√3
= √13+√12
= 3.61+3.46
= 7.07

x-1/x
= 7.07-(1/7.07)
= (49.98-1)/7.07
= 48.98/7.07
= 6.93