5x2 - 5x + 1 = 0
if you could give an explanation that would be good :)
the 5x2 means 5 times x squared.
2007-09-09 02:52:49 · 6 answers · asked by tropicalia_la 3 in Science & Mathematics ➔ Mathematics
sorry but none of these answers are correct :(
2007-09-09 03:32:43 · update #1
x = [5 ±√(25 - 20)] / 10
x = [ 5 ± √(5) ] / 10
2007-09-12 22:47:45 · answer #1 · answered by Como 7 · 0⤊ 0⤋
First split the 5x2 up. So make it 5x X 5x, because thats what a square is. Leave that for now. Take the 1 and bring it over to the zero. Since you are switching sides, you change its symbol from a plus to a minus. So now we have the following:
5x X 5x -5x = (-1).
Now, 5x X 5x equals 25x. You just multiply the 5s. 25x - 5x equals 20x. Therefore, 20x = (-1). Then 20 divided by negative one, which equals -20. So x = -20. If this explanation went way over your head, let me know, and I can clarify.
2007-09-09 09:59:33 · answer #2 · answered by hockeygalscores 2 · 1⤊ 2⤋
5x² - 5x + 1 = 0
Normally you can factor the eqution to find what 2 numbers have a product of, in this case, 5 and add up to 5, and there aren't any here.
Since this equation does not factor easily then use the quadratic formula:
.............-b±â(b²-4ac)
x = -------------------------------------
.................2a
a = 5
b = -5
c = 1
x = (5+â5)/2
x = (5-â5)/2
2007-09-09 10:35:21 · answer #3 · answered by 037 G 6 · 0⤊ 0⤋
well solve it like you would if it wasn't squared and then take the square root since its sqAURED. I'm telling you right becuase I've taken algebra geometry and algebra 2 all honors.E-mail me for further questions.
2007-09-09 09:59:01 · answer #4 · answered by devilgirl 2 · 0⤊ 2⤋
quadratic formula
and you get (sqrt(5)(+-)5)/10
2007-09-09 09:58:52 · answer #5 · answered by Richard Boolean 2 · 1⤊ 2⤋
use the quadratic formula.
2007-09-09 10:10:21 · answer #6 · answered by pas6934 1 · 0⤊ 2⤋