2root2x^2+9x+5root2

Let p(x) = 2√2x² + 9x + 5√2
                = 2√2x² + 4x + 5x + 5√2
                = 2√2x² + 2√2√2x + 5x + 5√2
                = 2√2x(x + √2) + 5(x + √2)
                = (x + √2) (2√2x + 5)