Question

simplify ,(root 18+root 45)/(root 18-root 45) - (root 18-root 45)/(root 18+root 45)​.Simplify the above question.

Answer 1

Answer:

-39

Step-by-step explanation:

{(√18+√45)/(√18-√45)}×{(√18-√45)/(√18+√45)}

After rationalising,

{(√18+√45)²/(√18)²-(√45)²}×{(√18-√45)²/(√18)²-(√45)}

={(18+45+18√10)/(18-45)}×{(18+45-18√10)/18-45}

=( 63+18√10/-27)×(63-18√10/-27)

=(63)²-(18√10)²/729

=3969-32400/729

=-28431/729

=-39