Answer:
1. (2x^2+x-1)
Step-by-step explanation:
expanding (2x^2-1)^2. multiplying (x-2) (1-2x)
= 4x^2-4x+1. = x-2x^2-2+4x
= -2x^2+5x-2
(4x^2-4x+1-2x^2+5x-2)
=2x^2+x-1
B. Is the answer because you can fold it in half
Easy. Just add a 0 on the end of the numerator and denomenator.
Answer:
The following statement below are reasons why random sampling are preferred over other sampling:
O. A random sample is a fair way to select a sample because each member of the population has an equal chance of being selected.
O. A random sample is always the easiest way to select a sample from a population.
O. A random sample is likely to give you a sample that is representative of the population.
Step-by-step explanation:
