Questions on Algebra: Complex Numbers answered by real tutors!

Tutors Answer Your Questions about Complex Numbers (FREE)

Question 380561: how do you write (-1+i)-(7-5i) as a complex number in standard form
Click here to see answer by nerdybill(6962)

Question 380882: When trying to check a solution, say that your answer is 9+5i what is i equal to so that when you check you can plug that in
Click here to see answer by Fombitz(13828)

Question 380932: a * (1/a) = 1 (a 0)
i get confused with these formulas
Click here to see answer by robertb(4012)

Question 381117: (4+2i)+(-1+3i)
Click here to see answer by jim_thompson5910(28598)

Question 381141: The question wants you to find the complex zeros and factor the polynomial in standard form: F(X) = x^3 - 1.
Click here to see answer by neatmath(300)

Question 381527: -2+i
Click here to see answer by stanbon(57387)

Question 381656: How do you solve for x? f(x)=x^3/(x^2-4)
Click here to see answer by Fombitz(13828)

Question 381680: 3x(x-5)=2
Click here to see answer by Fombitz(13828)

Question 381819: (7-6i)+(9+11i)
Click here to see answer by richard1234(5390)

Question 381701: hello all,
I am taking grad level complex algebra and i will appreciate if anyone can help me with the following problem:
Find the common greatest divisor between 3+4i and 4-3i
Click here to see answer by Edwin McCravy(8909)

Question 382096: √(2x+15)=x+6
Click here to see answer by edjones(7569)

Question 382380: what is this simplified:(-5-8i)-(-4-6i)
What is this simplified: (3+i)/(2-i)
Click here to see answer by stanbon(57387)

Question 383034: e^x = 5 convert to logarithmic equations
Click here to see answer by edjones(7569)

Question 383037: What is a complex number in standard form for the expression (1-3i)-(5+4i)-12i?
Click here to see answer by CharlesG2(828)

Question 383150: Let z1, z2 and z3 be three complex numbers in geometric progression. Suppose that the
average of these numbers is 10, while the average of their squares is 20i. Determine the
value of z2, the middle term.
Click here to see answer by Jk22(389)

Question 383516: 1/2(x-4)^2=8
Click here to see answer by mananth(12270)

Question 383580: I need help with complex numbers. We have been working on them all week, but it's a little hard to understand. Will you help me?
Click here to see answer by CharlesG2(828)

Question 383666: how do you solve x^2+x-5=0 and come out with the answer
Click here to see answer by Alan3354(30993)

Question 384096: say u+iv (where u and v are real numbers, and i is the imaginary unit) is a root of a quadratic polynomial; then, is u-iv also a root of that polynomial? Why, or why not?
Click here to see answer by richard1234(5390)

Question 384511: Could someone help me with this problem. I am lost. Step by step so I can understand what is done please.
Fast food. If four out of five doctors prefer fast food, then at a convention of 445 doctors, how many prefer fast food?
Click here to see answer by rfer(12670)

Question 384509: could someone show me how to work this out. I am lost. Thank you so much.

Rise and run. If the rise is 3/2 and the run is 5, then what is the ratio of the rise to the run?
Click here to see answer by rfer(12670)

Question 384767: solve for x in terms of i.
(5+i)x+1-3i=(2-3i)x+2-i
Click here to see answer by ewatrrr(10682)

Question 384770: express in polar form, using the smallest non-negative value for the argument.
-1/2 + radical 3/2 i
Click here to see answer by stanbon(57387)

Question 384772: perform the indicated operation, using polar form.
4cis pie * 3cis(-pie over 2)

b) 2(cos pie + i sin pie) * 5( cos 3pie over 4 + i sin 3pie over 4)
Click here to see answer by stanbon(57387)

Question 384769: z=r(cos theta + i sin theta) show:
a) {z}=r
b) 1/z = 1/r(cos theta - i sin theta)
Click here to see answer by stanbon(57387)

Question 384862: a+6/a-8 divide by 4a+24/a-9

divide and simplify
Click here to see answer by stanbon(57387)

Question 384891: I don't need answers I just need you to explain how to do the problem

1) 4/8 + 2y/8xy
2) a²+a-72/8a * 1/a-8
3) 9a/16a^3-64a² / 9a/6a-24

Click here to see answer by Alan3354(30993)

Question 385138: if f(x)=x-3 divided by 2 then f(1 divided by 4) is equal to
Click here to see answer by mananth(12270)

Question 385138: if f(x)=x-3 divided by 2 then f(1 divided by 4) is equal to
Click here to see answer by stanbon(57387)

Question 385138: if f(x)=x-3 divided by 2 then f(1 divided by 4) is equal to
Click here to see answer by rfer(12670)

Question 385137: if f(x)=x-3 divided by 2 then f(1 divided by 4) is equal to
Click here to see answer by mananth(12270)

Question 385233: Have I done this correctly?
2i/3-8i
mult. top and bottom by 3+8i
now 6+16i/9-64i^2
for 6/-55 , 16/-55i

Click here to see answer by stanbon(57387)

Question 385922: the measure of the supplement of an angle is 26 degrees more the 7 times the measure of an angle . to the nearest hundredth what is the measure of the angle
Click here to see answer by richard1234(5390)

Question 386387: im really confused when it comes to complex numbers
this is one of the questions
(3-2i)x+3=(4+3i)x-4i
so my teacher showed us to distribute then to get the x's on one side and the non x's so i've got
-1x-ix=-4i-3
i would then multiply by a zero to get
x+ix=4i-3
after that im completly lost
Click here to see answer by solver91311(16897)

Question 386558: Let x and y be real numbers. If (x+yi) - (2-3i) = -6+4i, what are the values of x and y?
a) x=8, y=7
b) x=8, y=1
c) x=-4, y=7
d) x=-4, y=1
Click here to see answer by sudhanshu_kmr(1152)

Question 386564: Solve for x: (x-1)/(x+5) = x/(2(x+5))
Click here to see answer by ewatrrr(10682)

Question 386622: it says perform the indicated operation, and write the result in the standard form a+bi. the equation is 2+3i/1-5i. i have no clue what to do

Click here to see answer by ptaylor(2048)

Question 387308: We're currently working on factoring polynomials, solving equations by completing squares and writing expressions as a complex number in standard form. I'm having the most trouble with writing expressions as a complex number in standard form. Currently I need help with
x^2-6x+25=0
Thank you so much for your help!
Click here to see answer by jim_thompson5910(28598)

Question 387343: Evaluate i^(-i) and sketch
Click here to see answer by stanbon(57387)

Question 387372: 9+i divided by 1-5i
Click here to see answer by scott8148(6628)

Question 387554: Find real numbers a and b such that:
a+ib=4 (i as in imaginary)
Click here to see answer by Jk22(389)

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