Calculate the expected value, the variance, and the standard deviation of the given random variable x. (round all answers to two
1 answer:
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Answer:
x = ± 2
Step-by-step explanation:
To find the x- intercepts let y = 0 , that is
4x² - 16 = 0 (add 16 to both sides )
4x² = 16 ( divide both sides by 4 )
x² = 4 ( take the square root of both sides )
x = ± = ± 2
The x- intercepts are x = - 2 and x = 2