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Another Annoying algebra problem.


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You forgot to carry the subraction sign all the way through. If should be:




and that boils down to:




I can't factor that any more unless n(w-n)+(1-w) helps.

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Could go this way

X = -n2+wn-w+1= w(n-1) + 1 - n2


and 1 - n2= (1-n)(1+n)

therefore X = w(n-1) + (1-n)(1+n) = w(n-1) - (n-1)(1+n) = (n-1)(w-n-1)

X = (n-1)(w-n-1)

Check it. I may have made a mistake. Easy to do. :)

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