SOLUTION: If Sqrt x-3=4, then x= So I got 7 but I really don't know what I'm doing help me please Can you give details so I can figure out the rest of my homework thank you

Algebra ->  Square-cubic-other-roots -> SOLUTION: If Sqrt x-3=4, then x= So I got 7 but I really don't know what I'm doing help me please Can you give details so I can figure out the rest of my homework thank you      Log On


   

Question 942483: If Sqrt x-3=4, then x=
So I got 7 but I really don't know what I'm doing help me please
Can you give details so I can figure out the rest of my homework thank you
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
7 is not correct.
sqrt%28x-3%29=4
First square both sides of the equation.
x-3=16
x=16%2B3
x=19
Verifying,
sqrt%2819-3%29=4
sqrt%2816%29=4
4=4
True, good solution.