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u^2 + uv + v has no simple factorisation.

As a quadratic in u, it can be "factorised" by using the quadratic formula to find the root values (r1 and r2) for u, and then the factorisation would be (u - r1)(u - r2); however the values of the roots are:

r1 = (-v + √(v^2 - 4v))/2

r2 = (-v - √(v^2 - 4v))/2

which leads to the complicated "factorisation":

u^2 + uv + v = (u + (v + √(v^2 - 4v))/2)(u + (v - √(v^2 - 4v))/2)

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10y ago

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