2007-05-20 08:02:50 · 4 answers · asked by Dave 4 in Science & Mathematics ➔ Mathematics
The quadratic formula is this:
-b±√(b²-4ac) divide by 2a (in fraction form)
You then must make the equation in standard form.
ax² + bx + c = 0
3x² - 11x - 4 = 0
11±√(121 - 4(3)(-4))
2(3)
Simplify within the radical.
11±√(121 + 48)
2(3)
Simplify again within the radical.
11±√(169)
2(3)
Simplify again within the radical.
11±13
2(3)
Simplify the denominator.
11±13
6
Simplify the radical.
11±13
6
Then you get (11-13) or (11+13) both divided by 6.
Simplify.
Your answers are -2/3 or 4.
2007-05-20 08:31:00 · answer #1 · answered by Austin 2 · 0⤊ 0⤋
3x² - 11x - 4 = 0
x = [11 ± √(121 + 48)] / 6
x = [11 ± √(169)] / 6
x = [11 ± 13] / 6
x = 4 , x = - 1/3
2007-05-20 08:11:00 · answer #2 · answered by Como 7 · 0⤊ 0⤋
(3x+1)(x-4) so x = -1/3 and 4
2007-05-20 08:13:14 · answer #3 · answered by Anonymous · 0⤊ 0⤋
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2016-12-17 18:11:31 · answer #4 · answered by Anonymous · 0⤊ 0⤋