The factoring is as follows: x2 - y2 = (x + y) * (x - y)
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x^2 - y^2 - 4 is in its simplest form.
(4x - 7y)(4x + 7y)
That doesn't factor neatly. Applying the quadratic formula, we find two real solutions: (5 plus or minus the square root of 73) divided by 12. y = 1.128666978776461 y = -0.2953336454431275
x6 - y6 = (x3)2 - (y3)2 = (x3 + y3) (x3 - y3) = (x + y)(x2 - xy + y2)(x - y)(x2 + xy + y2)
3 * x * x * y