The sum of two squares cannot be factored. It can be represented thus: X2 + y2 = (x + yi)(x - yi) In this expression, the i is the symbol for the imaginary number the square root of -1.
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X + y
Only when X or Y = 0 That is because (x + y) squared = x^2 + 2xy + y^2 x^2 + 2xy + y^2 = x^2 + y^2 when x or y = 0
All you can do to factor that expression is to divide both terms by y: y2 + 4y = y(y + 4)
(2, -2)
x2 + y2 = (x + iy)(x - iy) ' i ' = sqrt(-1) K2KQU