# Questions on Algebra: Complex Numbers answered by real tutors!

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 Algebra: Complex Numbers Solvers Lessons Answers archive Quiz In Depth

 Question 423756: How do we determine the number of real roots of an equation? can you determine the number of real solutions in the following equations? 1. x^2 - 5x = 0 2. x^2 + 2x + 8 = 0 Click here to see answer by jim_thompson5910(28595)

 Question 423537: 4-2i divided by 2+5i (I could use some practice problems too if you can direct me where to find them on this site - just dont get imaginary number!) Click here to see answer by jsmallt9(3296)

 Question 425549: A chemist has 100 milliliters of a solution that contains a 20% concentration of acid. How many milliliters of pure acid must be added in order to increase the concentration of the solution to 50%? Click here to see answer by mananth(12270)

 Question 425732: modulus of ((3+4i)^6 * (6-8i)^4) / ((4-3i)^2 * (6+8i)^3) I assume there is a short trick to the problem, because multiplying out the numbers is very long. r=mod= sqrt x^2+y^2 = sqrt z * z conjugate Click here to see answer by Edwin McCravy(8909)

 Question 425846: Take any number (except for 1). Square that number and then subtract one. Divide by one less than your original number. Now subtract your original number. Did you reached 1 for an answer? You should have. How does this number game work? Hint: Redo the number game using a variable instead of an actual number and rewrite the problem as one rational expression. How did the number game use the skill of simplifying rational expressions? Click here to see answer by richard1234(5390)

 Question 426015: I am taking a placement test next week and i need some help with some math. with complex numbers i^32 power Click here to see answer by josmiceli(9678)
 Question 426015: I am taking a placement test next week and i need some help with some math. with complex numbers i^32 power Click here to see answer by solver91311(16885)

 Question 426393: Simplify the complex fraction: x(squared)-y(squared) _____________________ xy ______________________ 1 1 _ - _ y x Click here to see answer by edjones(7569)

 Question 426503: Which of the following are solutions to the equation below? Check all that apply. 3x2 + 27x + 60 = 0 A. -4 B. -60 C. -27 D. 4 E. 5 F. -5 Click here to see answer by Gogonati(809)

 Question 426581: in the standard (x,y) coordinate plane, point m with coordinates (5,4) is the midpoint of AB, and B has coordinates (7,3). What are the coordinates of A? Click here to see answer by ewatrrr(10682)

 Question 427883: which function is not one to one? 1. [(0,1),(1,2),(2,3),(3,4)] 2.[(0,0),(1,1),(2,2),(3,3)] 3.{(0,1),(1,0),(2,3),(3,2)} 4.{(0,1),(1,0),(2,0),(3,2)} Click here to see answer by richard1234(5390)

 Question 428405: solve for x by using the completing the square method X^2-8X= -12 Click here to see answer by unlockmath(1599)

 Question 429893: The sum of 2 numbers is 1 and their product is 1. What are the 2 numbers? Click here to see answer by Alan3354(30993)

 Question 430933: 1. divide and write the result in a+bi form: 3 over 2+i 3/2+i Click here to see answer by Gogonati(809)

 Question 431454: In 1975 the price of gasoline per gallon was 52.9 cents. With the 1975 price as the reference value, the gasoline price index for 1998 is 197.8. What was the cost of a gallon of gasoline in 1998? Round to the nearest cent as needed. Click here to see answer by jorel1380(2518)

 Question 431581: I am on break and can't get help from my math teacher, I need to answer a question using these two functions f(x)=x^5-x^4+40x^2-x-39 and h(x)=2x^4+7x^3-3x^2-14x-6 How many roots do f(x) and h(x) each have in the complex numbers? Help is greatly appreciated. Click here to see answer by tinbar(128)

 Question 431672: What is the answer to 3 over 5-11i, in the form of a + bi? I think I need to multiply 3 over 5-11i by 5+11i over 5+11i. Can someone help me, please? Click here to see answer by tinbar(128)

 Question 431413: Why does ei*pi+1=0 other than the fact that my calculator says so, and so I believe it? Click here to see answer by richard1234(5390)

 Question 431744: Can you please tell me the answer to 5i to the fourth power? I think it is 625. My thought is, if "i" is involved, and a number is to an even power, then it is a positive number. If it is to an odd power, then it is a negative number. Click here to see answer by richard1234(5390)

 Question 431787: If i=the square root of _1, what is then 4i(6i)= SHOW ME THE STEPS SO THAT I CAN DO THE OTHERS BY MY SELF Click here to see answer by richard1234(5390)

 Question 432413: how do you find real numbers x and y for which (x+2i)(y-i)=-4-7i Click here to see answer by Gogonati(809)

 Question 432385: Please help me with this problem determine k so that the first polynomial is a factor of the second. ; ; I tried but I don't understand it still Click here to see answer by ankor@dixie-net.com(15652)

 Question 432854: Find the dicriminant and determine the number of real solutions then solve please. 3x^2-75=0 Click here to see answer by mananth(12270)

 Question 433530: i need help in algebra 1 (9.1)thouhg (9.7)...thank you.. Click here to see answer by richard1234(5390)