Answer:
![4+6i-6i^2+3i^3-4i^4=6+3i](https://tex.z-dn.net/?f=4%2B6i-6i%5E2%2B3i%5E3-4i%5E4%3D6%2B3i)
Step-by-step explanation:
Given the expression
![4+6i-6i^2+3i^3-4i^4](https://tex.z-dn.net/?f=4%2B6i-6i%5E2%2B3i%5E3-4i%5E4)
as
![i^2=-1\\](https://tex.z-dn.net/?f=i%5E2%3D-1%5C%5C)
so
![=4+6i-\left(-6\right)-3i-4i^4](https://tex.z-dn.net/?f=%3D4%2B6i-%5Cleft%28-6%5Cright%29-3i-4i%5E4)
Group like terms
![=-4i^4+6i-3i+4+6](https://tex.z-dn.net/?f=%3D-4i%5E4%2B6i-3i%2B4%2B6)
Add similar items
![=-4i^4+3i+4+6](https://tex.z-dn.net/?f=%3D-4i%5E4%2B3i%2B4%2B6)
Add the numbers
![=-4i^4+3i+10](https://tex.z-dn.net/?f=%3D-4i%5E4%2B3i%2B10)
![=6+3i](https://tex.z-dn.net/?f=%3D6%2B3i)
Thus,
![4+6i-6i^2+3i^3-4i^4=6+3i](https://tex.z-dn.net/?f=4%2B6i-6i%5E2%2B3i%5E3-4i%5E4%3D6%2B3i)
Hmm try 192.5 I think that’s right
The solution to the given simultaneous equation; x + 2y = -4, 2x + 5y = 1 using substitution method is x = -22 and y = 9
<h3>Simultaneous equation</h3>
x + 2y = -4
2x + 5y = 1
Using Substitution method
From equation (1)
x = -4 - 2y
Substitute x = -4 - 2y into equation (2)
2x + 5y = 1
2(-4 - 2y) + 5y = 1
-8 - 4y + 5y = 1
- 4y + 5y = 1 + 8
y = 9
Substitute y = 9 into
x + 2y = -4
x + 2(9) = -4
x + 18 = -4
x = -4 - 18
x = - 22
Therefore, the solution to the given simultaneous equation; x + 2y = -4, 2x + 5y = 1 using substitution method is x = -22 and y = 9
Learn more about simultaneous equation:
brainly.com/question/16863577
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Answer:
-7
Step-by-step explanation:
30-16= -5n +3n
14 = -2n
multiplying both by half,u have -
7 = -n
multiply both by -1
7 = n
Answer:
x = 0.25
Step-by-step explanation:
When logs are added together, they are actually multiplied and then the logs taken of the product.
That sentence is actually correct, but you are going to have to read it a couple of times. You might understand it if I actually just solve the problem.
ln(2x) + ln(2) = 0 Combine the two subjects to make 1 ln.
ln (2)(2x) = 0 Now take the antilog
ln(4x) = 0
antilog ln(4x) = e^0 e^0 = 1
4x = 1 See your last problem.
x = 1/4
Now the question is "What's the answer?" It might be 1/4 but I doubt it. A better choice would be x = 1/4 or x = 0.25
I'd try the last one first.