Question

a^4+4 factorise this question​

Answer 1

Answer:

Step-by-step explanation:

$a^{4}-4$

($a^{2}$)²-2²

($a^{2}$+2)($a^{2}$-2)

($a^{2}$+2)($a^{2}$-$\sqrt{2} ^{2}$)

($a^{2}$+2)($(a+\sqrt{2}) (a-\sqrt{2})$