# Homework Help: Question about determining digits of a number

1. Mar 8, 2006

### GeoMike

The question is:
If $$\sqrt{ABADEC} = BEB$$ what is the value of the digit "D"?

I'm completely lost as to how to start on this one. I tried expanding the numbers as powers of ten:
BEB = B*102 + E*101 + B*100
= B(102 + 1) + 10E
= 101B + 10E
...but I couldn't really do anything with it after that.

I don't want an answer, just a hint on how to proceed.

Thanks!
-GM-

Last edited: Mar 8, 2006
2. Mar 8, 2006

### shmoe

Try taking this expression and squaring it.