
on this point we can use the formula to factor
![v=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a}](https://tex.z-dn.net/?f=v%3D%5Cfrac%7B-b%5Cpm%5Csqrt%5B%5D%7Bb%5E2-4ac%7D%7D%7B2a%7D)
where a is 4, b is 12 and c is 9
replacing
![v=\frac{-(12)\pm\sqrt[]{(12)^2-4(4)(9)}}{2(4)}](https://tex.z-dn.net/?f=v%3D%5Cfrac%7B-%2812%29%5Cpm%5Csqrt%5B%5D%7B%2812%29%5E2-4%284%29%289%29%7D%7D%7B2%284%29%7D)
and solving
![\begin{gathered} v=\frac{-12\pm\sqrt[]{144-144}}{8} \\ \\ v=\frac{-12\pm\sqrt[]{0}}{8} \\ \\ v=-\frac{12}{8}=-\frac{3}{2} \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20v%3D%5Cfrac%7B-12%5Cpm%5Csqrt%5B%5D%7B144-144%7D%7D%7B8%7D%20%5C%5C%20%20%5C%5C%20v%3D%5Cfrac%7B-12%5Cpm%5Csqrt%5B%5D%7B0%7D%7D%7B8%7D%20%5C%5C%20%20%5C%5C%20v%3D-%5Cfrac%7B12%7D%7B8%7D%3D-%5Cfrac%7B3%7D%7B2%7D%20%5Cend%7Bgathered%7D)
The root is

then the polynomial has one root -3/2 if we rewrite the polynomial is

or
Check the picture below.
make sure your calculator is in Degree mode.
Answer:
Step-by-step explanation:
9/6 or the simplified version is 1 1/2
Answer: Mean = 5.25
Variance = 1.3125
Standard deviation = 1.456
Step-by-step explanation:
The mean and variance of a binomial distribution with parameters n (number of trials) and p ( the probability of getting success in each trial) is given by :-

Given : The total number of enter a clothing store : n=7
The probability of a customer making a purchase= 0.75
Now,
