Question

factorise: x²-1-2a-a²​

Answer 1

Answer:

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

Step-by-step explanation:

x²-1-2a-a²

=>(x)² - {(1)²+2(1×a)+(a)²                                (a+b)²=a²+2ab+b²

=>(x)² - (1+a)²                                                a²-b²=(a-b)(a+b)

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

HOPE THE ANSWER IS CORRECT.

Answer 2

Answer:

Given:

• x² -1 - 2a - a².

Find:

• Factorise the given terms.

Calculations:

⇒ x² - 1 - 2a - a²

⇒ x² - (1 + 2a + a²)

⇒ x² - (1² + 2 × 1 × a + a²)

⇒ x² - (1 + a)²

⇒ (x + 1 + a) [x - (1 + a)]

⇒ (x + a + 1) (x - a - 1)

This is the answer.