Question

X square - 3 x + 1 equals to zero where x not equals to zero then find the value of x cube minus one by x cube

Answer 1

Step-by-step explanation:

Given (x/y) + (y/x) = – 1 On taking LCM and simplifying, we get (x2 + y2)/xy = – 1 ⇒ x2 + y2 = – xy ⇒ x2 + y2 + xy = 0 → (1) Consider, x3 – y3 = (x – y)(x2 + y2 + xy) = (x – y) (0) [From equation (1)] =