Question

if a-1/a = 3 ,find a² + 3a + 1/a² - 3/a​

Answer 1

Answer:

    87.5 or 35/4

Step-by-step explanation:

a - 1/a = 3

a - 1 = 3a

3a - a = -1

2a = -1

a = -1/2

  {-1/2}² + 3{-1/2} + 1/{-1/2}² - 3/{-1/2}

= 1 / 4 - 3 / 2 + 4 + 6

= 1/4 - 6/4 + 10

= -5 / 4 + 10

= -5 + 40 / 4

= 35/4

= 87.5