Question

(z - 1)(z + 1)(z2 + 1)​

Answer 1

Answer:

z⁴-1

Step-by-step explanation:

the first 2 terms are simplified as

a²-b² = (a+b)(a-b)

(z²-1)(z²+1) using same identity we get

z⁴-1

hope it helps

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