Question

Rationalise the denominator.
A. 5÷√7+√8

Answer 1

Answer: 5√8-5√7

Step-by-step explanation:

5/√7+√8

5(√7-√8)/(√7+√8)(√7-√8)

5(√7-√8)/(√7)* - (√8)*

5(√7-√8)/7-8

5(√7-√8)/-1

-5(√7-√8)

-5√7+5√8

5√8-5√7

Please see that * is used in place of whole square