Question

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Answer 1

hey here is the answer

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Answer 2

Answer:

(x + 2)(x - 2)(x + 1)

Step-by-step explanation:

Given : x³ + x² - 4x - 4

We can write this as in the form of brackets.

→ (x³ + x²) - (4x + 4)

Taking common terms out from both brackets.

→x²(x + 1) - 4(x + 1)

→ (x² - 4)(x + 1)

Now, we can write this as :

→ [ (x)² - (2)² ] (x + 1)

Identity : a² - b² = (a + b)(a - b)

Identity : a² - b² = (a + b)(a - b) Here, a = x, b = 2

→ (x + 2)(x - 2)(x + 1)

Other identities which are frequently used :

• (a + b)² = a² + 2ab + b²

• (a - b)² = a² - 2ab + b²

• (a + b)² - (a - b)² = 4ab