2007-10-03 10:56:37 · 6 answers · asked by LOVELY 1 in Science & Mathematics ➔ Mathematics
is that sqrt(2x) or sqrt(2x+20+2)? You can't expect people to do your homework for you if you can't even type the problem correctly.
2007-10-03 11:02:33 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Sqrt(2x+20) + 2 = x
Sqrt(2x+20) = x-2
2x+20 = (x-2)^2
2x + 20 = x^2 -4x +4
x^2 - 6x-16=0
(x+2) * (x-8) = 0
x = -2 or 8
2007-10-03 18:02:57 · answer #2 · answered by Mathematica 1 · 0⤊ 0⤋
sqrt (2x + 20) + 2=x <-- Hope this is correct interpretation.
sqrt(2x+20) = x-2
2x+20 = x^2-4x+4
x^2-6x -16 = 0
(x-8)(x+2) = 0
x = 8
x = -2 is rejected as extraneous
2007-10-03 18:11:09 · answer #3 · answered by ironduke8159 7 · 1⤊ 0⤋
Depends if it's sqrt(2x) or sqrt(2)x. Big difference.
If you post an update to your question to clarify (and if I notice...) I'll try to post an edit to this answer.
2007-10-03 18:03:52 · answer #4 · answered by SV 5 · 0⤊ 0⤋
22. = x
2007-10-03 18:02:24 · answer #5 · answered by illbey0urmistake 2 · 0⤊ 1⤋
x=-22
2007-10-03 18:00:29 · answer #6 · answered by Lilo 2 · 0⤊ 1⤋