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2 years ago

How can you rewrite the expression (8-5i)^2 in the form of a +bi

1 answer:

3 0

$\bf \textit{recall that }i^2=-1\\\\
-------------------------------\\\\
(8-5i)^2\implies (8-5i)(8-5i)\implies 64-40i-40i+(5i)^2
\\\\\\
64-80i+(5^2i^2)\implies 64-80i+(25\cdot -1)\implies 64-80i+(-25)
\\\\\\
64-80i-25\implies 39-80i$

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lisov135 [29]

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Step-by-step explanation:

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3 years ago

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madreJ [45]

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2 years ago

What is the rate of change of the linear relationship modeled in the table (-2,5) (-1,4) (0,3) (1,2)

poizon [28]

The rate of change of the linear relationship is -1.

Explanation:

It is given that there is a linear relationship between all these points, these points lie on a straight line.

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Substituting the points $(-2,5)$ and $(-1,4)$ , we get,

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Thus, the slope is -1.

Thus, the rate of change of the linear relationship is -1.

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3 years ago

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EastWind [94]

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3 years ago

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cluponka [151]

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3 years ago