Tutors Answer Your Questions about Complex Numbers (FREE)
Question 250525: I'm on algebra 2 and need help with my work please. It says find the value of the complex numbers pairs. Please check my work.
1. (5+3i)+(-4+2i)
(5-4)+(3i+2i)Answer 1+5i
2. (5+3i)-(-4+2i)
(5+4)+(3i-2i)Answer 9+i
3.(2-4i)(3+i)
6-10i-4(-1)=6-10i+4 Answer 10-10i
4. (2-4i)/(3+i)
(2-4i)/(3+i)Answer -4i+2/i+3
5. (1-i)(3+2i)
(1-i)(3+2i)=3+2i-3i-2i^2 Answer 5-i
Click here to see answer by richwmiller(17219)   |
Question 250725: Good evening, I am currently studying for an important exam tomorrow morning, and I am wondering if you can solve my question:
I got this problem on a test. The directions say to simplify.
(2-i sqrt(5)/(2+i sqrt( 5 )
May I ask how to do this problem?
Thanks!
Click here to see answer by MRperkins(300)  |
Question 251815: If a matrix B results from a matrix A by applying an elementary row operation, is there always an elementary row operation that can be applied to B to recover A ?
Show that if the linear equations
x1 + kx2 = c and x1 + lx2 = d have the same solution set, then the equations are identical
Click here to see answer by richwmiller(17219) |
Question 252093: *i tried to put this in the geometry category for pythagreon thereom but for some reason it wouldnt let me
The hypotenuse of a right triangle is 2cm longer than one leg and 4cm longer then the other.
a.draw and label a diagram
- i attempted to do this and i got the hypotenuse to be 4x and one leg to be 2x and the other to be x
b.let x represent the length of the hypotenuse. Use the pythagreon thereom to write an equation to solve for x.
-i used a squared + b squared=c squared and got 2x squared plus x squared= 4x squared, i was not sure if this was correct but i had to make an attempt
c. find the solutions from the equation in part b.
- i tried to solve for x but i got zero which cant be right because if you plug it into the equation you get zero for all the sides which would make this whole question pointless
help would be very appreciated
Click here to see answer by stanbon(75887) |
Question 252737: 9) the expression i to the 25 power is eqivalen to?
a) -i
b)1
c)i
d)-1
10) What does the expression i to 100th power + i to the 101 power + i to the 102 power equal?
a) 1
b)i
c)-i
d)-1
11) What is the sum of 5-3i and the conjugate of 3+2i?
12) The expression 3i(2isquared-5i) is eqivalent to?
a)15-5i
b)-15-5i
c)8+5i
d)2-5i
Click here to see answer by Alan3354(69443)  |
Question 252963: Can you help me with the corrections for my math test i failed and i want to do better. What we are doing are radicals/complex numbers.
3 is the index square root and inside of the square root is 32x to the sixth y to the ninth
Click here to see answer by drk(1908) |
Question 253915: Express the product of 4 – 3i and 2 + i in simplest a + bi form.
1. 2 + 11i
2. 2 – 11i
3. 11 + 2i
4. 11 – 2i
I have an application on my graphing calculator allowing me to add/subtract/multiply/or divide complex numbers. I used that and came up with 4-5i? Yet that isn't an answer choice?
Click here to see answer by Theo(13342)  |
Question 253915: Express the product of 4 – 3i and 2 + i in simplest a + bi form.
1. 2 + 11i
2. 2 – 11i
3. 11 + 2i
4. 11 – 2i
I have an application on my graphing calculator allowing me to add/subtract/multiply/or divide complex numbers. I used that and came up with 4-5i? Yet that isn't an answer choice?
Click here to see answer by scott8148(6628)  |
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