solve 5x squared +10x-2=0?

1 ⤊

2007-09-01 10:35:42 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

5 x ² + 10 x - 2 = 0
x = [ -10 ± √(100 + 40) ] / 10
x = [ - 10 ± √(140) ] / 10
x = [- 10 ± 2√35 ] / 10

2007-09-01 23:38:59 · answer #1 · answered by Como 7 · 1⤊ 0⤋

Confirmation.
-b+/-âbÂ²-4ac Ã· 2a

-10+/-â100+40 Ã· 10
-10+/-â140 Ã· 10
-10+/-â14

2007-09-01 11:03:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋

Hi.
Use the quadratic formula: http://www.purplemath.com/modules/quadform.htm
5x squared = a
10x = b
-2 = c
Good luck!!

2007-09-01 10:47:05 · answer #3 · answered by F 6 · 0⤊ 0⤋

use quadratic formula, there is no other way

2007-09-01 10:52:27 · answer #4 · answered by ~USA~ 2 · 0⤊ 0⤋