Question

la factorisacion de x²+1 - 2x - a² - y² + 2ay​

Answer 1

$x²+1 - 2x - a² - y² + 2ay =$

$(x \times 1) {}^{2} - (a {}^{2} + 2ay + y {}^{2} ) =$

$(x - 1) {}^{2} - (a + 1) {}^{2} =$

$(x - 1 - (a + y)) \times (x + 1 + (a + 1)) =$

$(x - 1 - a - y) \times (x - 1 + a + y)$