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elixir [45]
3 years ago
14

Please help answer!!!!

Mathematics
1 answer:
user100 [1]3 years ago
8 0

Answer:

? = 4

Step-by-step explanation:

You are in the third quadrant. You want the answer to come out to the equivalent of 225o or pi + pi/ 4 = 5/4 * pi

x - pi/2 = 5/4 pi

x = 5/4 pi + pi/2

x = 5/4 pi + 2*pi / 4

x = 7/4 pi

? = 4

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State what kind of variation you have, then solve the problem. A 15-person road crew is scheduled to finish repairing a highway
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2 years ago
Veronica needs blinds for the window in her bedroom. the window is 2 meters tall and 4 meters wide. what is the area of the wind
Alona [7]

The area of the window is 8m^{2}.

<h3>What is the area?</h3>

An object's area is how much space it takes up in two dimensions. It is the measurement of the number of unit squares that completely cover the surface of a closed figure.

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According to the question,

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Learn more about the area here:

brainly.com/question/25292087

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sweet [91]

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<u>Solution:</u>

Given, equation is x^{2}-2 x+5=0

We have to find the roots of the given quadratic equation

Now, let us use the quadratic formula

x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}  --- (1)

<em><u>Let us determine the nature of roots:</u></em>

Here in x^{2}-2 x+5=0 a = 1 ; b = -2 ; c = 5

b^2 - 4ac = 2^2 - 4(1)(5) = 4 - 20 = -16

Since b^2 - 4ac < 0 , the roots obtained will be complex conjugates.

Now plug in values in eqn 1, we get,

x=\frac{-(-2) \pm \sqrt{(-2)^{2}-4 \times 1 \times 5}}{2 \times 1}

On solving we get,

x=\frac{2 \pm \sqrt{4-20}}{2}

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x=\frac{2 \pm \sqrt{16} \times \sqrt{-1}}{2}

we know that square root of -1 is "i" which is a complex number

\begin{array}{l}{\mathrm{x}=\frac{2 \pm 4 i}{2}} \\\\ {\mathrm{x}=1 \pm 2 i}\end{array}

Hence, the roots of the given quadratic equation are 1 + 2i and 1 – 2i

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