SOLUTION: if 6 is added to a number and then subtracted from the same number, the product of the sum and the difference is 189. What is the number? It's not 15, please show me how to get th

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: if 6 is added to a number and then subtracted from the same number, the product of the sum and the difference is 189. What is the number? It's not 15, please show me how to get th      Log On


   

Question 211379: if 6 is added to a number and then subtracted from the same number, the product of the sum and the difference is 189. What is the number?
It's not 15, please show me how to get the answer. Thank YOu.
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
I agree that 15 is a correct answer. However, since you ended up solving this like a quadratic equation (you did, didn't you???), there will be TWO solutions:
x=15 and x=-15.

R^2