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Nostrana [21]
2 years ago
8

What are the solutions to this quadratic equation? -2x2+x+4=0

Mathematics
2 answers:
natka813 [3]2 years ago
8 0

Answer:

=1±33√4

Step-by-step explanation:

Bad White [126]2 years ago
3 0

Answer:

x =\frac{1+/-\sqrt{33} }{4}

Step-by-step explanation:

It wouldn't let me put the symbol in the equation but +/- is just the same thing as ±

This answer is correct on edmentum/plato

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1 simple geometry question attached (10 points) go! :)
Artyom0805 [142]
What is the question ??????
3 0
3 years ago
Is -18x - 7 equal to -6(3x - 7)?
adoni [48]

Answer:

No

Step-by-step explanation:

-18-7 is not equal to -6(3x-8) beacuse

-6(3x-8)= -18x+42

its obivous that the two values are not same

5 0
3 years ago
Read 2 more answers
A rectangular garden 6 meters wide has a diagonal measuring 10 meters. find the perimeter of the garden.
FromTheMoon [43]
The perimeter would be:
 6+6+10+10
12+20
perimeter= 32
HOPE THIS HELPS YOU! ^_^
7 0
3 years ago
(7 + 7i)(2 − 2i)
Ostrovityanka [42]

The complex number  -7i into trigonometric form is 7 (cos (90) + sin (90) i) and  3 + 3i in trigonometric form is 4.2426 (cos (45) + sin (45) i)

<h3>What is a complex number?</h3>

It is defined as the number which can be written as x+iy where x is the real number or real part of the complex number and y is the imaginary part of the complex number and i is the iota which is nothing but a square root of -1.

We have a complex number shown in the picture:

-7i(3 + 3i)

= -7i

In trigonometric form:

z = 7 (cos (90) + sin (90) i)

= 3 + 3i

z = 4.2426 (cos (45) + sin (45) i)

\rm 7\:\left(cos\:\left(90\right)\:+\:sin\:\left(90\right)\:i\right)4.2426\:\left(cos\:\left(45\right)\:+\:sin\:\left(45\right)\:i\right)

\rm =7\left(\cos \left(\dfrac{\pi }{2}\right)+\sin \left(\dfrac{\pi }{2}\right)i\right)\cdot \:4.2426\left(\cos \left(\dfrac{\pi }{4}\right)+\sin \left(\dfrac{\pi }{4}\right)i\right)

\rm 7\cdot \dfrac{21213}{5000}e^{i\dfrac{\pi }{2}}e^{i\dfrac{\pi }{4}}

\rm =\dfrac{148491\left(-1\right)^{\dfrac{3}{4}}}{5000}

=21-21i

After converting into the exponential form:

\rm =\dfrac{148491\left(-1\right)^{\dfrac{3}{4}}}{5000}

From part (b) and part (c) both results are the same.

Thus, the complex number  -7i into trigonometric form is 7 (cos (90) + sin (90) i) and  3 + 3i in trigonometric form is 4.2426 (cos (45) + sin (45) i)

Learn more about the complex number here:

brainly.com/question/10251853

#SPJ1

3 0
2 years ago
Two adjacent, supplementary angles form a<br><br> line?
omeli [17]
obtuse because it all adds up to 180 degrees 
8 0
3 years ago
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