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Anonymous
1 - x/(x2 + x) = 1 - x/[x(x+1)] = 1 - 1/(x+1) = (x+1)/(x+1) - 1/(x+1)
= x/(x + 1)
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The expression x2 + 1x - 12 can be factored out as (x - 3)(x + 4)
7 + 1x + 5 = 12 + x
x - 3
x - 2
It can be simplified to: x-5y