Reduce the factor of 2 from dividend and divisor.
You could factorize x from the numerator.
You could try factorization further of the numerator; or use polynomial division.
15x 12
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x^2+x-2 | 15x^3 27x^2 -18x -24
|
| 15x^3 15x^2 -30x
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0 12x^2 12x -24
12x^2 12x -24
------------------------
0 0 0
Now the expression is
or better,