Question

factorise
$x {}^{4 } + 4$
​

Answer 1

Answer:

(x + 2)² - 4x

Step-by-step explanation:

Given : x⁴ + 4

We can write this as :

→ (x)² + (2)²

Identity : a² + b² = (a + b)² - 2ab

Here, a = x, b = 2

→ (x + 2)² - 2(x)(2)

→ (x + 2)² - 4x