Question

The sum of a number and its reciprocal is 8. Find this number.

Answer 1

are there choices

Answer 2

x +1/x = 8
1/x = 8 - x
1 = 8x - x^2
x^2 - 8x + 1 = 0

Then use the quadratic formula...

Answer 3

[1 ± sqrt(33)] / 2
[-1 ± sqrt(33)] / 2
[-8 ± sqrt(60)] / 2
[8 ± sqrt(60)] / 2

Answer 4

well since its -b as the first part of quadratics and it turns to be positive 8 the answer is the last one...