Question

factorise a square + 1 by a square - 18

Answer 1

Step-by-step explanation:

${a}^{2} + 1 \: by\: {a}^{2} - 18$

(a²+1) × (a²-18)

a²(1+1) × a²(1-18)

2a² × -17a²

-34a⁴ ANS.

Answer 2

Step-by-step explanation:

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