SOLUTION: I worked this out sqrt(3x+3)- 9 = 0; I came up with x=2 and checking the problem by plugging 2 in, I came up with 81 not = to 9. Can someone advise please?

Algebra ->  Radicals -> SOLUTION: I worked this out sqrt(3x+3)- 9 = 0; I came up with x=2 and checking the problem by plugging 2 in, I came up with 81 not = to 9. Can someone advise please?       Log On


   

Question 51295This question is from textbook
: I worked this out sqrt(3x+3)- 9 = 0; I came up with x=2 and checking the problem by plugging 2 in, I came up with 81 not = to 9. Can someone advise please? This question is from textbook

Found 2 solutions by Earlsdon, dagwoode:
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Solve:
sqrt%283x%2B3%29-9+=+0 Add 9 to both sides of the equation.
sqrt%283x%2B3%29+=+9 Square both sides.
3x%2B3+=+81 Subtract 3 from both sides.
3x+=+78 Divide both sides by 3.
x+=+26 Check:
sqrt%283%2826%29%2B3%29-9+=+0
sqrt%2878%2B3%29-9+=+0
sqrt%2881%29-9+=+0
9-9+=+0
0+=+0

Answer by dagwoode(1) About Me  (Show Source):