I require help to simplify this. I used the method to make the denominator a single fraction then multiply the top by the reciprocal but when it comes to cancelling, I'm not sure if i've done it right. (1)/((x^2)+x+2)/(1+(2)/(x((x^2)+x+2)))

agantisbz

agantisbz

Answered question

2022-07-18

Help to simplify this complicated fraction
I require help to simplify this. I used the method to make the denominator a single fraction then multiply the top by the reciprocal but when it comes to cancelling, I'm not sure if i've done it right.
1 x 2 + x + 2 1 + 2 x ( x 2 + x + 2 )

Answer & Explanation

Killaninl2

Killaninl2

Beginner2022-07-19Added 20 answers

Assuming x 0 and x 2 + x + 2 0 (the latter is always the case):
1 x 2 + x + 2 1 + 2 x ( x 2 + x + 2 ) x ( x 2 + x + 2 ) x ( x 2 + x + 2 ) = x x ( x 2 + x + 2 ) + 2
It is not possible to simplify this further, if not by factorizing the denominator. Please keep in mind the conditions I've put in the beginning.
EDIT: factorization leads to the final answer:
x ( x + 1 ) ( x 2 + 2 )
Only for non-zero x; now that you've got an explicit form of the fraction, you can put existence conditions. In this case, x 0 and x 1
jlo2ni5x

jlo2ni5x

Beginner2022-07-20Added 8 answers

1 x 2 + x + 2 1 + 2 x ( x 2 + x + 2 ) = x x ( x 2 + x + 2 ) + 2 = x ( x + 1 ) ( x 2 + 2 )
where x 1

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