Question

• if y2-9y=1 then y-1/y =​

Answer 1

Answer:

y-1/y=9

Step-by-step explanation:

${y}^{2} - 9y = 1$

$y(y - 9) = 1$

$y - 9 = \frac{1}{y}$

Then, substituting

1/y in the equation, y-1/y,

$y - \frac{1}{y} = y - (y - 9)$

$= y - y + 9 = 9$