2007-07-25 19:18:43 · 4 answers · asked by alma g 1 in Science & Mathematics ➔ Mathematics
2x² + x - 6 = 0
x = [ - 1 ± √(1 + 48) ] / 4
x = [ -1 ± 7 ] / 4
x = 6 / 4 , x = - 8 / 4
x = 3 / 2 , x = - 2
2007-07-25 20:03:36 · answer #1 · answered by Como 7 · 0⤊ 0⤋
Factor.
Factor rule: a²+2ab+b²=(a+b)²
2 3
3 6
(2x-3)(3x+6)=0
so...
x=3/2,-6/3
simplifed.
x=3/2,-2
ps. I am right because you can blug in the numbers I've given you and it will always = 0 relative to the given numbers. This is based on the rule.
2007-07-25 19:21:25 · answer #2 · answered by Anonymous · 0⤊ 1⤋
(3x+6) (2x-3)
because when u factor it out u get
6x^2 - 9x +12x -18
then simplify
6x^2 + 3x - 18
2007-07-25 19:32:43 · answer #3 · answered by Anonymous · 0⤊ 0⤋
its in the form ax^2 + bx + c= 0
the quad form is something like sq. root of b^2 plus/minus....and so on.
so here a = 6
b=3
and c=-18
now all you gotta do is plug n chug!
goodluck!!
btw, the factoring method mentioned above by someone works well too (actually its easier).
:)
2007-07-25 19:28:18 · answer #4 · answered by maya 2 · 0⤊ 1⤋