coltonsteighner
19.07.2020 •
Mathematics
6x2 + 12x + 2 = -10
Quadratic equation solve
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Ответ:
6x^2+12x+12=0.
Divide by 6 on both sides.
X^2+2x+2=0
Plug into quadratic formula
X=(-2 +\- (2^2-4•1•2))^1/2) /2•1
X=(-2 +\- (-4)^1/2)/2
X=(-2+\- 2i) /2
X=-1+\- I
X= -1 + i OR -1 - i
Ответ:
Cluster sampling
Step-by-step explanation:
Cluster sampling refers to the sampling that is used in market analysis. It is used when a researcher can not obtain information as a whole for the population but may obtain information through the groups or clusters
In the given case since andrew divides the residents through regions so this reflected the cluster sampling method