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

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 Question 629409: Solution or formula for doing Factoring Completely. I have 3 problems to start with as a guild - but I have loads more coming up. That is why I need to know how to do them. FACTOR Completely. If polyonomial is PRIME state it. 1. -2x-99+x^2 2. 40a^8+16a^7+25a^9 3. 25x^2+10x+1 __________________________ Now this is how I was doing it: 1. -2x-99+x^2 Factor the trinomial x^2-2x-99 Answer: (x+9) (x-11) Am I on the right tract? Click here to see answer by Alan3354(34677)

 Question 629418: Simplify. 7x+28/x^2 +4x Answer is 7/x. How do you come up with this? Thanks Click here to see answer by Alan3354(34677)

 Question 629350: Subtract the following polynomials: (-8x^3 + x) - (-6x + 8 + 4x^3) Click here to see answer by Edwin McCravy(9717)

 Question 629435: Solve (x+5)(x-9)(x+3)>0, the solution set is {x| } Click here to see answer by jsmallt9(3438)

 Question 629459: Solve (x+5)(x-9)(x+3)>0, the solution set is {x| } Click here to see answer by Edwin McCravy(9717)

 Question 629520: find the degree of the polynomial function g(x) = -7x^3 + 9 Click here to see answer by reviewermath(721)

 Question 629521: find the zeros of the polynomial function f(x) = x^3 + x^2 - 42x Click here to see answer by reviewermath(721)

 Question 629522: find the zeros of the polynomial function f(x) = x^3 + 4x^2 - 9x -36 Click here to see answer by reviewermath(721)

 Question 629494: What are the values of x for which 8-x^2 < 5? I tried solving for x and got x < sqrt(3). That is only one piece in this puzzle, though. How would I go about answering this question? This problem comes from a practice test I took today in preparation for an upcoming math placement exam. Thank you! Click here to see answer by jsmallt9(3438)

 Question 629766: I need step by step help here how do I factor the polynomial 36r^3-24-5r? Click here to see answer by solver91311(18785)

 Question 629774: I need a step by step solution to the following question please, how do I factor the polynomial 12x^3+3x^2-15x+3? Thank you desprately need help!! Click here to see answer by richwmiller(10279)

 Question 629782: the ratio of 2:3:4 if divided by 19,575 . how much will each receive ? Click here to see answer by stanbon(60771)
 Question 629782: the ratio of 2:3:4 if divided by 19,575 . how much will each receive ? Click here to see answer by solver91311(18785)

 Question 629772: How do I factor the polynomial 90-15x^2-18xy+3x^2y? Step by step answers work best for me so I know how you got to where you got, thank you!! Click here to see answer by richwmiller(10279)

 Question 629769: step by step how would I solve the polynomial -p^3-2p^2+5p+10? Click here to see answer by richwmiller(10279)

 Question 629491: 1/x-1/y ________ 1/x+1/y Simplify. When I first attempted this problem, I multiplied the numerators of the fractions that make up the numerator (1-1)of the overall fractions with the denominators of the denominator of the fraction (x + y). I did the same with the numerators of the denominator and the denominator of the numerator, to get x+y/x-y. Seeing that this was one of the answer choices, I assumed it to be correct. I may have been a bit hasty in this, as my answer turned out to be wrong. Please walk me through this problem so I can solve similar ones on my upcoming math placement exam! Thank you so much. Click here to see answer by ankor@dixie-net.com(16524)

 Question 629981: I am not sure how to start this problem do i find a common denominator first? x/4+1/3x=x/3 solve for x Click here to see answer by ewatrrr(11176)

 Question 629997: find all numbers for which each rational expression is undefined 1. 5x/6x-24 2. x2 +3/ x2-3x+2 Click here to see answer by ewatrrr(11176)

 Question 630089: How many roots do the following equations have? -12x2 - 25x + 5 + x3 = 0 Click here to see answer by Alan3354(34677)

 Question 630069: find an nth degree polynomial function with the real coefficients satifying the given conditions n=4; i and 5i are zeros; f(-1)=104 Click here to see answer by jsmallt9(3438)

 Question 630091: Divide -3x3 - 2x2 - x - 2 by x – 2. A. -3x2 + 4x + 15, R 32 B. -3x2 + 4x + 15 C. -3x2 - 8x - 17 D. -3x2 - 8x - 17, R –36 Click here to see answer by jsmallt9(3438)