This is an algebra I addition problem x divided by x squared minus four PLUS 1 divided by x squared plus two x
x + 1
x^2 - 4 x^2 + 2x
This is an algebra I addition problem x divided by x squared minus four PLUS 1 divided by x squared plus two x
x + 1
x^2 - 4 x^2 + 2x
Begin by factoring the denominators:
x/[(x - 2)(x + 2)] + 1/[x(x + 2)]
The common denominator is x(x + 2)(x - 2)
Multiply the first fraction by x/x and the second fraction by (x -2)/(x - 2)
x/x * x/[(x - 2)(x + 2)] + (x -2)/(x -2) * 1/([x(x +2)]
Multiply the numerators and the denominators to get
x^{2}/[x(x - 2)(x + 2)] + (x - 2)/[x(x - 2)(x + 2)]
Now that the denominators are the same, we can add the numerators. We should get
(x^{2} + x - 2)/[x(x - 2)(x + 2)]
After factoring the numerator, we have
[(x + 2)(x - 1)]/[x(x - 2)(x + 2)]
Since both the numerator and the denominator have an x + 2 term, we can cancel them out to get
(x - 1)/[x(x - 2)]
You can distribute the x in the denominator to get a final answer of
(x - 1)/(x^{2} - 2x)