Please answer this and my recent questions if you can

Ivan began dividing g2  – 6 by g + 1, noting that . he started by placing g in the quotient, as shown below.what is g2  – 6 divided by g + 1? g –  1 –  g + 1  – g  –  7 + g  –  5  + 

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n