Question

Factorise: a^4+4 ..........(pls don't write anything just for points,If you don't know then don't gave any answer)

Answer 1

Answer:

${a}^{4} + 4 \\ \\ = {(a ^{2} })^{2} + {(2)}^{2} \\ \\ using \: formula \\ \\ {a}^{2} + {b}^{2} \\ \\ = (a - b) ^{2} + 2ab \\ \\ = ( {a}^{2} - {2}) + 2 {a}^{2} \times 2 \\ \\ = ( {a}^{2} - 2) ^{2} + 4 {a}^{2}$

# keep smiling ☺

Answer 2

Answer:

4a2 is the correct answer

hope you get it no explanation