The problem is (5x - 1)^2=16/25
is the answer -4/5, 4/5
2006-07-05 16:31:17 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
close, but unfinished
(5x - 1)^2 = (16/25)
5x - 1 = (-4/5) or (4/5)
5x = (1 - (4/5)) or (1 + (4/5))
5x = ((5/5) - (4/5)) or ((5/5) + (4/5))
5x = (1/5) or (9/5)
divide both sides by 5
x = (1/25) or (9/25)
2006-07-05 17:01:55 · answer #1 · answered by Sherman81 6 · 1⤊ 0⤋
No. What you get is that 5x-1=±4/5. The answer is that x=9/25 or 1/25.
2006-07-05 23:36:55 · answer #2 · answered by Pascal 7 · 0⤊ 0⤋
You have two cases, the -4/5 and the positive 4/5.
(5x-1) = -4/5 solve for x
(5x-1) = 4/5 solve for x
2006-07-05 23:36:37 · answer #3 · answered by Nick 2 · 0⤊ 0⤋
Well, (5x-1)=positive or negative 4/5. 5x therefore equals +/- 9/5, and x = +/- 9/25.
2006-07-05 23:36:41 · answer #4 · answered by biosafety_level_4 2 · 0⤊ 0⤋
5x - 1 = -4/5 0r 4/5
You still have not solved for the value of x. You need to solve the equation twice for x...once for -4/5 and once for 4/5.
2006-07-05 23:43:07 · answer #5 · answered by RedyRob 2 · 0⤊ 0⤋
yes
2006-07-06 01:45:12 · answer #6 · answered by ? 2 · 0⤊ 0⤋