2007-03-28 14:01:01 · 6 answers · asked by smileforme 1 in Science & Mathematics ➔ Mathematics
it about completing the square. please help. i am really confused.
2007-03-28 14:49:32 · update #1
its about completing the square. please help. thanks. :)
2007-03-28 14:50:03 · update #2
Factoring, like in the equation below, is usually done by mental thought combined with trial-and-error.
3x² - 2x - 5 =
(3x - 5)(x + 1)
If you're looking for the equation's roots: Once you have the two binomials, equal each one to "0" to find the roots:
3x - 5 = 0
3x = 5
x = 5/3
x + 1 = 0
x = -1
So, your root solutions are 5/3 and -1. To check:
3(5/3)² - 2(5/3) - 5 = 3(-1)² - 2(-1) - 5
3(25/9) - 10/3 - 5 = 3(1) - (-2) - 5
75/9 - 10/3 - 5 = 3 + 2 - 5
75/9 - 30/9 - 45/9 = 0
75/9 - 75/9 = 0
0 = 0
2007-03-28 14:11:38 · answer #1 · answered by Steven 4 · 0⤊ 0⤋
(3x-5)(x+1)
Simplified
2007-03-28 14:04:28 · answer #2 · answered by Anonymous · 0⤊ 1⤋
=3x*3x - 2x - 5
=9x - 2x = 5
=7x=5
=x=5/7
2007-03-28 14:04:33 · answer #3 · answered by Sharp Marble 6 · 0⤊ 1⤋
are asking what it can be factored as?
if thats the case,
(3x-5)(x+1)
i dont know what else you could be asking for, unless this is a philisophical question..lol
2007-03-28 14:05:19 · answer #4 · answered by experiencemytoxicity 1 · 0⤊ 0⤋
(3x-5)(x+1)
2007-03-28 14:06:27 · answer #5 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
(3x-5)(x+1)
2007-03-28 14:03:58 · answer #6 · answered by bob b 3 · 1⤊ 0⤋