Why is (n-1)(n+1)=n^2-1?

The basic answer is that you cross-multiply the values in each factor: (n - 1)(n + 1) n^2 - n + n -...
The basic answer is that you cross-multiply the values in each factor: (n - 1)(n + 1) n^2 - n + n -...
Apart from parable (Song 8:1, Nah 3:5, etc), in reality: Gen 24:2–3 on “primitive” gesture of touchi...
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I can give you many reasons 1. Men don’t want to be a retirement plan of a weasel. Unsurprisingly,...
you could write it as XxX, (avoid XXX), X(X), (X)(X), (X)X X^2, X*X or some put a dot waist high bet...
Most sweat on the scrotum is not from the scrotum, unless you wear hot underwear like boxers that ke...