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

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 Algebra: Complex Numbers Solvers Lessons Answers archive Quiz In Depth

 Question 25049: how do u solve x squared +7x-1 equals 0 Click here to see answer by stanbon(57361)

 Question 25762: Can you please help me with this, we are doing differential Calculus. Find the equation of the tangetn for each given x-value. y=x^2+8x+12, where x = -4. At the back of the book, it says the answer is y=-4 I have no idea how to get that. thank you. Click here to see answer by josmiceli(9686)

 Question 25761: Can you please help me with this, we are doing differential Calculus. Find the equation of the tangetn for each given x-value. y=x^2+8x+12, where x = -4. At the back of the book, it says the answer is y=-4 I have no idea how to get that. thank you. Click here to see answer by venugopalramana(3286)
 Question 25761: Can you please help me with this, we are doing differential Calculus. Find the equation of the tangetn for each given x-value. y=x^2+8x+12, where x = -4. At the back of the book, it says the answer is y=-4 I have no idea how to get that. thank you. Click here to see answer by Earlsdon(6287)

 Question 26058: ok, i just DONT understand imaginary numbers in problems! i really need help! heres a problem: 7i^3 + 8i^12 +9i^17 -5i^16 = ? PLEASE HELP! i dont know what to do with the numbers in front...!!! Click here to see answer by venugopalramana(3286)
 Question 26058: ok, i just DONT understand imaginary numbers in problems! i really need help! heres a problem: 7i^3 + 8i^12 +9i^17 -5i^16 = ? PLEASE HELP! i dont know what to do with the numbers in front...!!! Click here to see answer by Earlsdon(6287)

 Question 26352: A regular octagon is inscribed in a circle of radius 15.8 cm. Find the perimeter of the octagon. What is the angle of elevation of the sun when a 35-ft mast casts a 20-ft shadow Click here to see answer by uknouluvme89(30)

 Question 26351: A regular octagon is inscribed in a circle of radius 15.8 cm. Find the perimeter of the octagon. What is the angle of elevation of the sun when a 35-ft mast casts a 20-ft sha Click here to see answer by stanbon(57361)

 Question 26442: (-3)2 to 2nd power + 4 to 2nd power -1= Click here to see answer by Alwayscheerful(414)

 Question 26242: How do i show for integers m and n and a natural number k that is greator and equal to 1. m divides n right arrow m divides n^(k). Click here to see answer by venugopalramana(3286)

 Question 27035: Between 1970 and 1990, the population of Buffalo, New York, decreased at the rate or 0.82% per year. The population, P, in year t is given by where t=0 corresponds to 1980. Find the population in 1970. Click here to see answer by mbarugel(146)

 Question 27317: Find the multiplicative inverse of each complex number. 4-2i Click here to see answer by bmauger(101)

 Question 27616: Is the square root of plus or minus 5 (where the plus and minus are in front of the square root sign) the same thing as 5i and -5i ? If not what does 5i and -5i really mean? Click here to see answer by venugopalramana(3286)

 Question 27172: I am trying to find out if these are true: and I can verify and The following should be true, but I can't seem to prove it I run into a sign problem- keep getting +1 = -1 Thanks for your help Click here to see answer by venugopalramana(3286)

 Question 28088: What is the square root of i? Also what is the sq. root of -i? Click here to see answer by longjonsilver(2297)

 Question 28032: What is the minimum value of the expression modulus( a + b*w + c*w^2) where w & w^2 are complex cube roots of unity and a, b, c are constants which are not all equal? Click here to see answer by venugopalramana(3286)

 Question 28710: I am having trouble solving this problem cube root of (9y/2x) thanks for your help Click here to see answer by longjonsilver(2297)

 Question 28709: I am trying to solve (7(sqare root of x) +3)times(2(square root of x) -6) Click here to see answer by longjonsilver(2297)

 Question 28613: The sum of the first n terms of a arithmetic sequence is ginen by 2n+3n^2. Find the 10th term of the seuqence. Click here to see answer by venugopalramana(3286)

 Question 28721: I am also having a tough time with this problem negative square root of (-200x squared) Click here to see answer by josmiceli(9686)