Math, asked by madhu9810688697, 10 months ago

(z-1)(z+1)(z^2+1) simplify using identity​

Answers

Answered by rameshgunti76
0

Answer:

z^{4} - 1

Step-by-step explanation:

(z-1)(z+1)(z^{2}+1) = (z^{2} - 1^{2})(z^{2} + 1)

                                          = (z^{2} - 1)(z^{2} + 1)

                                          = (z^{2*2} - 1^{2})

                                          = z^{4} - 1

 identity used : (A + B)(A - B) = A^{2} - B^{2}

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