a2 - b2 = (a - b)(a + b)
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a2 - b2 = (a - b)(a + b)
It is the difference of two squares which is: (x+2y)(x-2y)
that's x2 - y2 = (x-y)(x+y)
That looks simple enough for me; but if you want to factor it, you can use the formula for the difference of two squares.
The difference of two squares which enables complex conjugates to be used.The difference of two squares which enables complex conjugates to be used.The difference of two squares which enables complex conjugates to be used.The difference of two squares which enables complex conjugates to be used.