Question

Factorise a^2 -1 -2x -x^2

Answer 1

Answer:

a² - 1 - 2x - x²

a² -(1 + 2x + x²)

a² - ( x + 1)²

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

Step-by-step explanation:

since

x² - y² = (x + y)(x - y)

Answer 2

Answer:

a² - 1 - 2x - x²

a² -(1 + 2x + x²)

a² - ( x + 1)²

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

Step-by-step explanation:

since

x² - y² = (x + y)(x - y)