Questions on Algebra: Complex Numbers answered by real tutors!

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Question 359084: sqrt(8) = a + bi was the problem given. I don't understand.
Click here to see answer by Fombitz(13828)

Question 359079: square root 8i = a + bi (?)
Click here to see answer by Jk22(389)

Question 358745: 586 divided by 2
Click here to see answer by Fombitz(13828)

Question 358346: 27a4 + 12b2
Click here to see answer by skarleth pavon123s(1)

Question 359828: Can you help me, please? Thank you!
Prove the identity
sin(x+y) - sin(x-y) = 2cos(x)sin(y)

Click here to see answer by jim_thompson5910(28715)

Question 359948: how do you solve for the given letter for a problem like
f=m M over g to the 2nd power solve for M
Click here to see answer by Fombitz(13828)

Question 359983: Prove that the complex conjugate of the sum of two complex numbers a+bi and c+di is the sum of their complex conjugates
Click here to see answer by CharlesG2(828)

Question 360110: (2+4i)/2i
Click here to see answer by CharlesG2(828)

Question 360871: It says to algrebraically solve for this equation for x.

1/x-2 (One divided by x minus 2 plus)...
2/x+1 (Two divided by x +1 equals)...
7x+1/x^2-x-2 (7x+1 divided x to the 2nd power -x-2)

This is all one equation. Hope it is understandable. I found that the LCD is (x-2)(x+1) I want to keep adding (x-1) to the LCD. Not sure why.
Click here to see answer by edjones(7569)

Question 360857: What is i^i ?
-----------
I got e^(-pi/2), but I'm not sure about it.
Click here to see answer by Fombitz(13828)

Question 361323: 3t>6t+12
Click here to see answer by rfer(12730)

Question 361320: 2r + 5 < -1=
Click here to see answer by rfer(12730)

Question 361327: Solve the inequality
3(x-2)-2
Click here to see answer by rfer(12730)

Question 361343: Simplify
4(3-m)-(2m+1)
Click here to see answer by rfer(12730)

Question 361330: integrale from ( -inf,+inf ) for e^-(ABSOLUTE VALUE OF X ) ?
CAN I GET ANY HELP ..SOON
THANKS
Click here to see answer by jim_thompson5910(28715)

Question 361430: my younger brother has the problem i to the power of 4 that is all the question has to it can you show us how to do the problem so that we can prepare for the final exam in december

Click here to see answer by jim_thompson5910(28715)

Question 361631: on page 280 of the algebra 2 book problem 5 reads i^40 i cant figure out how to solve it...
Click here to see answer by shorty4aboo(8)

Question 361631: on page 280 of the algebra 2 book problem 5 reads i^40 i cant figure out how to solve it...
Click here to see answer by jrfrunner(365)

Question 361835: ok so my math teacher never spends much time on our lesson. i've gone in for tutoring so she would help me understand but she always ignores my presence. If you would, just teach me the basics as soon as possible
Click here to see answer by solver91311(17077)

Question 362494: i am trying to solve a problem with the format ax squared + bx + c and im not quit sure how to do it. can you help me?
Click here to see answer by stanbon(57967)

Question 362759: complex number 4x²−2x+5=0
Click here to see answer by nyc_function(2733)

Question 363353: Write and algebraic fraction that would equal 3ab^2 after being simplified
Click here to see answer by user_dude2008(1861)

Question 363352: Simplify the following expression:
(-3x^3y^2)^3
Click here to see answer by user_dude2008(1861)

Question 363443: i want help on factorin numbers ?
Click here to see answer by Fombitz(13828)

Question 363827: 2+i/(3+i)(1+i)

Click here to see answer by Alan3354(31519)

Question 364445: Compute: 200!/198!

Click here to see answer by amoresroy(333)

Question 364483: EXPRESS 1+i/1-i in the form x+iy
Click here to see answer by Fombitz(13828)

Question 364557: (mn²)-⅓ (This is mn squared all raised to the power of negative 1/3)
Click here to see answer by ewatrrr(10682)

Question 364613: what is the sol
ution for 6i/3i? Thanks
Click here to see answer by edjones(7569)

Question 364613: what is the sol
ution for 6i/3i? Thanks
Click here to see answer by Alan3354(31519)

Question 364921: 4
5+3i
Click here to see answer by Fombitz(13828)

Question 365050: please help me.
what is the solution to 9 divided by 3-2i?
Click here to see answer by nerdybill(7003)

Question 364811: (-4-3i)-( square root of 7-2i)
Click here to see answer by Fombitz(13828)

Question 365384: I am supposed to factor this : 2x^3y-x^2y+5xy^2+xy^3
The only thing I have come up with so far is to factor out an xy.
Click here to see answer by Alan3354(31519)

Question 365403: Simplify (5+i)(-4-8i)and write the answer in standard form?
Click here to see answer by Fombitz(13828)

Question 365372:
Click here to see answer by robertb(4012)

Question 365761: I am so lost in my math class right now and need help.
I have a test tomorrow. We are working with Complex numbers, factoring and solving polynomial equations, solving quadratic equations by finding the square root, Perfect square trinomials, and graphing quadratic functions,
Well I have a review worksheet and Im lost on a few things.
A) Factor the exression.
1. 121^2-25
my attempt. i got -3025 with 55times-55 but I dont think tats right.
B) Simplify the expression.
1. 3sqrt(8)times sqrt(18)
(I wasnt at school the day we learned this so I'm clueless)
c) solve the equation.
1. 3x^2-100=332
my attempt 3x^2-100=332
+100 +100
3x^2=sqrt(44)
sqrt(x^2)=sqrt(144)
x=12
My question is, is what method do I use to solve the equation?

D) perform the given operation.
1. 1-2i
----
3-5i
clueless on this one as well.
Sorry for the overload on problems. I'm just really confused.
If you could help me understand thatwould be great. Thanks
Click here to see answer by Edwin McCravy(8999)

Question 366303: 2x2-7x+1=0
I know that the left side of the equation must =-1 but I don’t know how to solve for x

Click here to see answer by robertb(4012)

Question 366511: IN THE RIGHT TRIANGLE FIND THE LENGTH OF THE SIDE NOT GIVEN USE A CALCULATOR TO FIND AN APPROXIMATION TO THE DECIMAL PLACES.
A=3 B=5
THE VALUE OF C IS
(ROUND TO NEAREST THOUSANDTH)
Click here to see answer by Fombitz(13828)

Question 366546: a store mixes brazillian coffee worth $12 per kilogram an venezuelan coffee worth $16 per kilogram the mixture is to sell for $15 per kilogram find out how much of each should be used to make a 216 kilogram mixture.

how many kilogram of the brazillian coffee?
how many kilogram of the venezuelan coffee?

Click here to see answer by ewatrrr(10682)

Question 366574: a clerk counts $1.00 and $10.00 bills at the end of the day he finds he has a total of 49 bills having a combined monetary value of $139 . find the number of bills of each denomination
the clerk has --------ones and ------------tens?
Click here to see answer by amoresroy(333)

Question 366527: find fourier series of cos^3 of x, and sin^3 of x ..
any one could help ..pleez,,
thanks
Click here to see answer by Jk22(389)

Question 366614: Give exact and approximate solutions to three decimal places.
(x-7)^2=45 (what are the exact solutions) and (what are the approximate solutions)
Problem 2 same as above I need help with the exact and approximate solutions to
x^2+16x+64=49
Solve by completing the square:
x^2 +1/2x=1
Solve for X
x^2 + 14x + 4=0
a) solve 5x+x(x-3)=0 What are the solutions?
b)Find the x intercepts of
f(x)= 5x+x (x-3)
Click here to see answer by edjones(7569)

Question 366592: a boats crew rowed 18 miles downstream with the current in 2 hrs the return trip upstream against the current covered the same distance but took 4.5 hours. find the crews rowing rate in still water and the rate of the current.
the crew rowing rate in still water is --------- m.p.h
the rate of the current is -------------m.p.h
Click here to see answer by mananth(12270)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410