√2x-1 + x =8
The 2x + 1 is all under the radical.
2006-07-20 09:35:28 · 11 answers · asked by Anonymous in Family & Relationships ➔ Friends
2x + 1..its that one <-----, i just made a typo
2006-07-20 09:41:42 · update #1
sqrt(2x+1) + x = 8
Subtract x from each side
sqrt(2x+1) = 8 - x
Square each side
2x+1 = 64 - 16x + x^2
Move everything to the same side
x^2 - 18x + 63 = 0
Factor. What factors of 63 add to -18?
This doesn't factor, but there are solutions. Using the quadratic formula, you get
9 + 3sqrt(2) or 9 - 3sqrt(2)
With radical equations, you must check your answer each and every time.
If you check them, you will see that
9 - 3sqrt(2) is a solution.
2006-07-20 10:03:49 · answer #1 · answered by MsMath 7 · 2⤊ 0⤋
if its 2x + 1 (under radical) + x = 8, then it breaks down:
x^2 + 2x - 63 =0
(x-7) (x+9)
x= 7 or -9
2006-07-20 09:51:59 · answer #2 · answered by ryn182 2 · 0⤊ 0⤋
If its 2x+1 then the answer is:
x(2+x)=63
Here is the detail:
(√(2x+1))^2 + x^2 = 8^2 (you need to raise everything to the 2nd power so you can remove the square root.
2x + 1 + x^2 =64
2x+x^2=64-1
2x+x^2=63
x(2+x)=63
2006-07-20 09:43:48 · answer #3 · answered by fasb123r 4 · 0⤊ 0⤋
If I understood int right the way you wrote it here's your answer:
2x + x (under a radical) = 8 + 1
3x (under a radical) = 9
I don't know if that's a 2x or x squared 'cause the answer will be different...
2006-07-20 09:42:17 · answer #4 · answered by Sunny 4 · 0⤊ 0⤋
Been out of school for 30 yrs but this should help and a good place to bookmark for the future.
2006-07-20 09:38:49 · answer #5 · answered by Anonymous · 0⤊ 0⤋
i don't think of "radical 0.33 wave feminism" is a few thing it truly is reported in academia as a real phenomenon. a minimum of, i have under no circumstances heard of it. i can speculate about how a nil.33-wave feminist might want to take a nil.33-wave theory to an intensive end - like insisting that all and sundry women ought to gown as provocatively as attainable, with the intention to project the view that dressing provocatively might want to be a blameworthy aspect in any rape. (you comprehend, like, make each day a "Slutwalk.") yet it truly is only my own hypothesis. Radical 0.33 wave feminism only isn't an reported aspect.
2016-11-24 23:05:38 · answer #6 · answered by lindgren 4 · 0⤊ 0⤋
Is it sqrt(2x - 1) or sqrt(2x + 1)?
2006-07-20 09:38:54 · answer #7 · answered by musiclover 5 · 0⤊ 0⤋
x^2-18x+65=0
IF it's sqrt(2x-1)
2006-07-20 09:41:24 · answer #8 · answered by dvl_n_dskyz 3 · 0⤊ 0⤋
sorry look it up under Radical
2006-07-20 09:38:52 · answer #9 · answered by sweet84 1 · 0⤊ 0⤋
Wrong category.
2006-07-20 09:37:34 · answer #10 · answered by Nicole C 4 · 0⤊ 0⤋