# 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 214443: Find all numbers for which the rational expression is undefined. t^3-9t/t^2-16 Click here to see answer by solver91311(16877)

 Question 214445: Divide: (35b^3+18b^2+27b+37)/(5b+4) Is it: a. 7b+7 b. 7b^2+2b+7 c. 7b^2-2b-7+9/5b+4 d. 7b^2-2b-7-9/5b+4 Click here to see answer by Earlsdon(6287)

 Question 214682: Could you checking to see if I have a right answer? Thank you! Add simplify by collecting like radical terms if possible, assuming the expression represent nonnegative numbers. Sqrt(7a)+6sqrt(63a^3) Sqrt(7a)+6sqrt(9*7*a^2*a) Sqrt(7a)+6*3sqrt(7a) =(1+18a)Sqrt(7a) Click here to see answer by nerdybill(6958)

 Question 214675: I am pushing in as a teacher aide the problem is the school has jumped me by about 2 yrs in my math...I just don't remember...Here is the problem -2x^2+8x+20=0 Click here to see answer by nerdybill(6958)

 Question 214722: Can someone plese help me with this math problem Perform the indicated operation completely 5x+5/5x+9 + 5x+13/5x+9 Click here to see answer by stanbon(57299)

 Question 214784: Hello, I need help with simplifying this rational expression: x^2-100 over (x+10)^2 Click here to see answer by drj(1380)
 Question 214784: Hello, I need help with simplifying this rational expression: x^2-100 over (x+10)^2 Click here to see answer by stanbon(57299)

 Question 214789: could you checking and see if my answer is right? Thank you! Multiply. (3Sqrt(6)-9Sqrt(5)) (5Sqrt(6)+15Sqrt(5)) 15(6)^2-45Sqrt(30)+45Sqrt(30)-135*5 90-0-675 =-585 Click here to see answer by jsmallt9(3296)

 Question 214839: Hey, I am stuck on this question, and really need help...please help me! Jaime bought a case of concert T-shirts for \$450.She kept two for herself and sold the rest for \$560 making a profit of \$10 on each T-shirt. How many shirts were in the case? THank you very much, I appreciate it. Click here to see answer by rfer(12657)

 Question 214837: Thanks for the help in advance.. I need to know some steps :P Stuart agrees to a house-painting job for \$900. He takes 4 days longer than expected,and he has earned \$18.75 less per day than expected. In how many days did he expect to complete the house? Answer is 12 days. Click here to see answer by checkley77(12569)
 Question 214837: Thanks for the help in advance.. I need to know some steps :P Stuart agrees to a house-painting job for \$900. He takes 4 days longer than expected,and he has earned \$18.75 less per day than expected. In how many days did he expect to complete the house? Answer is 12 days. Click here to see answer by ankor@dixie-net.com(15647)

 Question 214993: assume x can represent any real number. Use absolute value notation when necessry. sqrtx^2-18x+81 I got sqrt(x-9)^2 is this correct? Click here to see answer by jim_thompson5910(28550)
 Question 214993: assume x can represent any real number. Use absolute value notation when necessry. sqrtx^2-18x+81 I got sqrt(x-9)^2 is this correct? Click here to see answer by drj(1380)

 Question 215063: Completly factor the polynominal -2x-6y-12 I dont even know where to start on this one.. so I dont have any work to show :( Click here to see answer by jim_thompson5910(28550)
 Question 215063: Completly factor the polynominal -2x-6y-12 I dont even know where to start on this one.. so I dont have any work to show :( Click here to see answer by stanbon(57299)

 Question 215064: Completly factor the polynominal h^4+2h^3-8h^2 I dont even know where to start on this one.. so I dont have any work to show :( Click here to see answer by jim_thompson5910(28550)

 Question 215108: How do I reduce this to simplest terms? 7m/2m+14 . 3m+21/9m I tried dividing by m in the first part of the equation and wasn't sure if i should use the m as the greatest common factor like m(7) over m( 2+14) is that right at all? I did the same thing on the other part of the equation dividing by 3m getting 3m(1+21) over 3m(3). Can you tell me if I am on the right track, and how to correctly solve this equation? Click here to see answer by jim_thompson5910(28550)
 Question 215108: How do I reduce this to simplest terms? 7m/2m+14 . 3m+21/9m I tried dividing by m in the first part of the equation and wasn't sure if i should use the m as the greatest common factor like m(7) over m( 2+14) is that right at all? I did the same thing on the other part of the equation dividing by 3m getting 3m(1+21) over 3m(3). Can you tell me if I am on the right track, and how to correctly solve this equation? Click here to see answer by stanbon(57299)

 Question 215192: Completely factor the polynomial -2x^2 – 6y – 12. Click here to see answer by stanbon(57299)
 Question 215192: Completely factor the polynomial -2x^2 – 6y – 12. Click here to see answer by drj(1380)

 Question 215191: Completely factor the polynomial -2x2 – 6y – 12. Click here to see answer by drj(1380)
 Question 215191: Completely factor the polynomial -2x2 – 6y – 12. Click here to see answer by RAY100(1637)

 Question 215204: subtract the polynomials using the horizontal format. 5x^3+x^2+4 from 8x^3-x-6 Click here to see answer by drj(1380)

 Question 215205: subtract the polynomials using the vertical format. 5x^2+x+2 from 9x^2-x-7 Click here to see answer by drj(1380)

 Question 215206: perform the operations as described. subtract the sum of -8n^2-9n-2 and -3n^2+n+4 from -13n^2-n+9 Click here to see answer by drj(1380)

 Question 215249: how do I Factor xy + xz + wy +wz Click here to see answer by stanbon(57299)

 Question 215252: How do I Multiply, simplify, and write in descending order: (t + 4)(t + 1)(2t -2) Click here to see answer by drj(1380)

 Question 215253: how do I Multiply, simplify, and write in descending order: (t + 4)(t + 1)(2t -2) Click here to see answer by drj(1380)
 Question 215253: how do I Multiply, simplify, and write in descending order: (t + 4)(t + 1)(2t -2) Click here to see answer by RAY100(1637)

 Question 215251: how do I Factor x^4 + 5x^3 – 84x^2 Click here to see answer by vleith(2825)
 Question 215251: how do I Factor x^4 + 5x^3 – 84x^2 Click here to see answer by drj(1380)

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