Solve by completing the square. d^2 − 6d = 19

Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.

d = or d =

Help would be appreciated as well as how to get the answer!

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Could somebody me with this radical simplification?

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?