Question

x square-1 -2a -a square ​

Answer 1

Answer:

assume a as x then u wilp get quadratic equation then just find its factors you will get your answer

Answer 2

Given to factorise:-

${x}^{2} -1 - 2a - {a}^{2}$

Solution:-

${x}^{2} - 1 - 2a - {a}^{2}$

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

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

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

$= (x + a + 1)(x - a - 1)$

Answer:-

$(x + a + 1)(x - a - 1)$

Identities used here:-

${x}^{2} - {y}^{2} = (x + y)(x - y)$