subtract and simplify: (3/x-4)-(2/x+4)?

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subtract and simplify: (3/x-4)-(2/x+4)?

2007-12-12 04:01:28 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

5 answers

(3/x-4)-(2/x+4)
3/x - 4 - 2/x - 4
3/x - 2/x - 8
1/x - 8

2007-12-12 04:06:14 · answer #1 · answered by Bill 2 · 0⤊ 0⤋

3/x -4-2/x-4 distribution of the negative sign
simplify: 1/x-8

2007-12-12 04:06:28 · answer #2 · answered by seansippo 3 · 0⤊ 0⤋

(3/(x-4))-(2/(x+4))?

find the common denominator:

(x-4) * (x+4)

[3(x+4) - 2(x-4)] / [(x-4) * (x+4)]

3x+12 - 2x+8 / [(x-4) * (x+4)]

[x + 20] / [(x-4)*(x+4)]

2007-12-12 04:06:35 · answer #3 · answered by KEYNARDO 5 · 0⤊ 0⤋

1/x - 8

2007-12-12 04:07:16 · answer #4 · answered by _asv_ 3 · 0⤊ 0⤋

= (3x+12 -2x+8) /[x^2-16) = (x+20)/(x^2-16)

2007-12-12 04:11:34 · answer #5 · answered by ironduke8159 7 · 0⤊ 0⤋