Question

Factorise: x²-1-2a-a²

Answer 1

Answer:

Hey mate hope it helps

x² - a² - 2a - 1

factor out a -1 from the last three terms:

x² -(a² + 2a +1)

factor the perfect square trinominal:

x² - (a + 1)²

factor this 'difference of perfect squares':

[x + (a +1)] [x - (a+1)]

distribute the negative sign in the second term to get:

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

Answer 2

Answer:

Hey

Image attached-