Mathematics: Solve by completing the square 9x^ - 18 x +93= -6

Solve by completing the square 9x^ - 18 x +93= -6

Ответ:

AgentPangolin

14.03.2022

Mathematics

take away 93 from both sides
9x^2 - 18 x = - 99

Divide by 9 through
x^2 - 2 x = - 11

Add (b/2)^2 to form perfect square
$x^2 - 2 x + ( \frac{2}{2} )^2 = - 11 + ( \frac{2}{2} )^2$

Form perfect square
(x - 1)^2 = - 10

Square root both sides to find x
$x - 1 = \pm \sqrt{-10}$

add 1 on both sides
$x = 1+ i\sqrt{10} \ or \ 1- i\sqrt{10}$

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Ответ:

McSporter

24.05.2022

Mathematics

D - outlier

Step-by-step explanation:

It can’t be A - the spread would the minimum and maximum.

‘Can’t be B - the mean in the overall average, which would probably be a bit higher than 13

Can’t be C - the median is the “middle” number when ordered smallest to largest. It would be 13 in this example

24 is an odd number compared to the rest. It seems like it might be an error in the data, because it is so different than all the rest - hence it is the outlier.

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Solve by completing the square 9x^ - 18 x +93= -6

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