# Questions on Algebra: Polynomials, rational expressions and equations answered by real tutors!

Algebra ->  -> Questions on Algebra: Polynomials, rational expressions and equations answered by real tutors!      Log On

 Ad: Mathway solves algebra homework problems with step-by-step help! Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

 Question 681627: How do I find the vertex of g(x) = x2 + 16x - 5 Click here to see answer by mathgotserved(25)

 Question 681619: Alright this is kinda a long question and I am hoping you can help me out Prove that (1-tan^2 x) / (1+tan^2 x) = cos 2 x For each step of the proof I also need to know what rule this applies to (algebra, reciprocal, quotient, Pythagorean, double angel, or sum and differences). Thank you so so much for your help! Click here to see answer by solver91311(18785)

 Question 681684: simplify the espression. n^2 - n/n^2 - 4n I came up with n - n/n - 4 just want to check if that is correct. If not can you please provide correct answer? Thanks! Click here to see answer by jim_thompson5910(29613)

 Question 681683: If possible, evaluate the expression for the given value of the variable. 9/x^2-7x + 12 x = -3 Click here to see answer by jim_thompson5910(29613)

 Question 681659: Given that x+1 is a factor of P(x)=4x^3+4x^2-x-1, factor P(x) completely into linear factors. What are the zeros of P(x)? Click here to see answer by ReadingBoosters(3246)

 Question 681764: perform the operation and simplify 1/x-y - 2/x^2-y^2 + 1/x+y Click here to see answer by mananth(13127)

 Question 681763: A right angled triangle has a height of 2x + 3 centimeters, and a hypotenuse of length 4x - 1 centimeters. Find and expression for the base of the triangle. Click here to see answer by mananth(13127)

 Question 681762: A rectangular swimming pool has an area of 18x^2 + 33x - 40. Find an expression for the perimeter of this pool. Click here to see answer by ankor@dixie-net.com(16523)

 Question 681829: I need help desperately! Rewrite with positive exponents. x^-1/8 Click here to see answer by Alan3354(34674)

 Question 681878: A rectangular swimming pool has an area of 18x^2 + 33x - 40. Find an expression for the perimeter of this pool. Click here to see answer by Alan3354(34674)

 Question 681876: Expand: (2x^2 + 4x + 5)(3x^2 - 6x + 7) Click here to see answer by jim_thompson5910(29613)

 Question 681990: Prove that (1-tan^2 x) / (1+tan^2 x) = cos 2 x For each step of the proof I also need to know what rule this applies to (algebra, reciprocal, quotient, Pythagorean, double angle, or sum and differences). Please state the rule after each step Thank you so so much for your help! Click here to see answer by stanbon(60771)

 Question 681921: Find a polynomial f(x)of degree 3 with real coefficients and the following zeros. 4,2+i Click here to see answer by ReadingBoosters(3246)

 Question 682285: What is -5/2 plus or minus the square root of -75 over 2? Thanks! Click here to see answer by unlockmath(1657)

 Question 682329: Find a polynomial function of degree 3 with zeros 1/2, 1-i; where P(4) = 140 Click here to see answer by Edwin McCravy(9716)

 Question 682346: I need help solving this operation and then writing it in standard form. (1+i)^17/(1-i)^16 Click here to see answer by lynnlo(4174)
 Question 682346: I need help solving this operation and then writing it in standard form. (1+i)^17/(1-i)^16 Click here to see answer by Edwin McCravy(9716)