Well, I might as well be the last person to discover this and, in fact, it makes ABSOLUTELY NOTHING even remotely easier, but…
I just realised that every squared number is exactly bigger by 1 than multiplication of the same number lower by one by a number bigger by one.
And then… I realised it’s perfectly explainable.
And then… oh well I should probably stick to drawing.
x^2 + x – x – 1 =
x^2 – 1 = y-1