Question

5. Factorise: a3- 1/a3 + 4
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Answer 1

Answer:

a3+(-1/a3)+1-3×a×1/a

=( a- 1/a+1){a2+1/a2+1+(a×1/a)+(1/a×1)-(1×a)}

=(a-1/a+1)(a2+1/a2+1+1+1/a-a)

=(a-1/a+1)(a2+1/a2+2+1/a-a)

Answer 2

Step-by-step explanation:

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