A. 2(z2 + 1)(z2 – 1)
B. 2(z2 + 1)(z – 1)(z + 1)
C. Prime
D. 2(z2 + 1)2
Answer:
The correct answer is B,
Step-by-step explanation:
Since the higher value of z's power, is 4, an even number, and the second number is negative, we can think that this binomial is made of a difference of squares, so that is what we are going to factorize.
First, extract the common number (if any), the number 2, we have now>
This is convenient since "1" is a wonderful number that has this feature> No matters what n's value is,
so the first equation can be written as
The later termn, can also be factorized, using the same as befre.
Remember that
swimming again? Can you please explain how you do this?