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3 years ago

33+44 please help me

Mathematics

2 answers:

e-lub [12.9K]3 years ago

7 0

Answer:

Step-by-step explanation:

Bezzdna [24]3 years ago

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Answer:

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What are the solutions of x^2-2x+5=0

sweet [91]

The solution of $x^{2}-2 x+5=0$ are 1 + 2i and 1 – 2i

Solution:

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)

Let us determine the nature of roots:

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,

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

$x=\frac{2 \pm \sqrt{-16}}{2}$

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

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

6 0

3 years ago

-0.75/2 - 1 < -1 with explanation pls

DochEvi [55]

Answer: -1.375 < -1

Step-by-step explanation:

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3 years ago

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A recipe makes 6 2/3 cups. The serving size is 5/6 cup. How many servings does the recipe make?

Dmitry [639]

Answer is a I just know

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3 years ago

Select the answer from each drop down menu. In tye diagram

maria [59]

Answer:

Theres no diagram or drop down menu

lmk when you get it and i will help you

Step-by-step explanation:

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3 years ago

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16. The temperature of an oven at 0°C has an

butalik [34]

Answer:

300K

Step-by-step explanation:

T = t + 273 °C

T is absolute temperature

t = given temperature (27°C in this case)

Hence T = 27 °C + 273 °C (standard temperature)

T = 300K (since absolute temperature is measured in K from the question's preamble)

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3 years ago