6x^2 +15x = 9
1
The answer is -2 ----- ,but u must show the steps..
2
2007-12-06 04:31:19 · 3 answers · asked by da_mexican_05@sbcglobal.net 1 in Science & Mathematics ➔ Mathematics
6x^2 + 15x = 9
6x^2 + 15x - 9 =0
2x^2 + 5x - 3 = 0
(2x - 1)(x + 3) = 0
x = 1/2 or x = -3
2007-12-06 04:38:28 · answer #1 · answered by Anonymous · 0⤊ 0⤋
6x² +15x = 9
6x² +15x - 9 = 0
Divide thru by 3
2x² +5x - 3 = 0
(x + 3)(2x - 1) = 0
x = -3, x = 1/2
.
2007-12-06 12:39:17 · answer #2 · answered by Robert L 7 · 0⤊ 0⤋
first simplify the question
it can b divided by 3
so u get 2x^2 +5x=3
2x^2+5x-3=0
2x^2+6x -1x-3=0
2x(x+3) -1(x+3)=0
(x+3)(2x-1)=o
either x+3 has to be equal to 0 (in which case x=-3)
or 2x-1 has to be equal to 0(in which case x=1/2)
2007-12-06 12:51:24 · answer #3 · answered by calmserene 4 · 0⤊ 0⤋