2 years ago

Determine the diameter of the circle with the equation x 2+ y 2= 9.

Mathematics

1 answer:

kotegsom [21]2 years ago

6 0

Answer: d = 6

Step-by-step explanation:

x^2 + y^2 = r^2

So r = 3 and d will be 2 x r = 6

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What is the complete factorization of the polynomial below

DerKrebs [107]

Answer:

$a. \ (x-2)(x+i)(x-i)$

Step-by-step explanation:

First of all let's notice that $(x-i)(x-i)=(x-i)^2 = x^2+2xi-1 \in \mathbb{C}$ while our original polynomial is real. So we can rule out the even options B and D. At this point, if the polynomial has a factor of $(x-\alpha)$ it means tha $\alpha$ is a zero of the polynomial. Let's check both 2 (for option a) and -2 (for option c)