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

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 Algebra: Polynomials, rational expressions and equations Solvers Lessons Answers archive Quiz In Depth

 Question 435688: what is 3x^2+30x+63 factored what is 8x^3-58x^2-48x facrored what is (-3xy)(-6x^2y) what is the surface area of a 2x^2 by 4x^3 by x^3 what is the length of a width of 2x-3 in and the area of 8x^2+2x-21 in^2 Click here to see answer by ewatrrr(10682)

 Question 435715: Which number(s) cannot be used in the following rational expression? 3x-9/a^2+10a+21 Click here to see answer by rwm(914)

 Question 435729: Factor the polynomial x2 + 10x + 9. Enter each factor as a polynomial in descending order. Click here to see answer by Alan3354(31532)
 Question 435729: Factor the polynomial x2 + 10x + 9. Enter each factor as a polynomial in descending order. Click here to see answer by rwm(914)
 Question 435729: Factor the polynomial x2 + 10x + 9. Enter each factor as a polynomial in descending order. Click here to see answer by richard1234(5390)

 Question 435795: I need help with this rational equation, [1/(x-2)]-(5/1)=1/(x+2) The answer is supposed to be: +,- [2sqrt(30)]/5 I always get an quadratic equation like 5x^2-20=0 (cant use the formula). Thank you! Click here to see answer by ewatrrr(10682)

 Question 435834: 6. Essay question: show all work. Find the difference: (6x^2 + 8x + 1) – (-5x^2 + x + 8) Click here to see answer by sudhanshu_kmr(1152)
 Question 435834: 6. Essay question: show all work. Find the difference: (6x^2 + 8x + 1) – (-5x^2 + x + 8) Click here to see answer by ewatrrr(10682)

 Question 435973: What are the roots in the equation 5x^2=x? Click here to see answer by robertb(4012)
 Question 435973: What are the roots in the equation 5x^2=x? Click here to see answer by Gogonati(817)

 Question 436095: -16p^3-2p , i know how to solve it but not with a cubed power =/ Click here to see answer by stanbon(57967)

 Question 436120: what do you get when you factoer x^2-x Click here to see answer by edjones(7569)

 Question 436209: What i the domain of the rational expression f(x)= x-5 over 2x+3 Click here to see answer by nerdybill(7008)

 Question 436225: How do I find the zeros of the polynomial 4x^3-12x^2-x+15? Click here to see answer by rwm(914)

 Question 436336: Factoring out the opposite of the GCF Factor each polynomial twice. First factor out the greatest common factor, and then factor out the opposite of the GCF. Factor: 12u^5v^6 + 18u^2v^3 - 15u^4v^5 Click here to see answer by stanbon(57967)

 Question 436399: When we factor a problem like X^2+5x+6, we get two sets of parenthesis, (x + 3) (x + 2). Why do we separate our factoring with these parenthesis? Does this have anything to do with being able to solve the problem? Click here to see answer by richard1234(5390)

 Question 436134: I need to factor by grouping... if possible can you show step by step and explain a little plz??? (A) 10x^2-45x+6x-27 (B) 3x^3+21x^2-8x-56 Click here to see answer by ankor@dixie-net.com(15746)

 Question 436468: How is x-5 a factor of the polynomial x^2-x-20? I know that x-5 is the answer but I have no idea how to do this. Thanks for your help, Sarah Click here to see answer by robertb(4012)

 Question 436523: Someone PLEASE help me!!! In some other universe, K. Pack believes he has discovered a relationship between a planet’s distance D from its sun and the time T it takes to orbit its sun. This formula ∜(D⁹), where T is in earth years and D=1 corresponds to the distance between earth and our sun, or 93,000,000 miles. (a) Planet Eta is 28 times farther from its sun than earth is to our sun. Estimate the number of earth years required for Eta to orbit its sun according to K. Pack’s formula. (b) Write this formula with rational exponents. I can not get this Thank you for your help. Click here to see answer by stanbon(57967)

 Question 436550: Perform the indicated operation (9 + 7i)(9-7i) Simplify the answer. Type the answer in the form a+bi. Can someone help me out here? thanks Click here to see answer by rwm(914)

 Question 436476: Find the exact perimeter of the rectangle. Then approximate your answer. √18cm √50cm The exact perimeter of the rectangle is ? cm Type an exact answer using radicals as needed. I get so confused on figuring perimeters can someone help? Thanks Click here to see answer by Alan3354(31532)

 Question 436657: (x-0.5x)-0.5(x-0.5x), Don't I get rid of the -0.5x(x-0.5) by mulpyling first? Click here to see answer by stanbon(57967)

 Question 436665: trying to solve this expression with an equal sign 4/(x+3) +2/(x+6) = -6/x^2 +9x + 18 I got that 6/(x+3)(x+6) = -6/(x+3)(x+6) Click here to see answer by stanbon(57967)

 Question 436618: I think is the right category. Sorry if it's not. Solve for x: x+1/x=-7/x+12 Click here to see answer by ankor@dixie-net.com(15746)