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

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 Question 478640: I am working on an equation that I am to answer in standard form. Ok I understand that. When I went to check my answer on an online problem solver the answer differs from what I got and I do not see why. (6a^3+2a^2-7)+(2a^3-a+7) here is what i did: 6a^3 + 2a^3 = 8a^3 2a^2 + (-a) = a (-7) + 7 = 0 so my answer is 8a^3 +a from problem solvers the answer is : 8a^3 +2a^2-a which is correct? Click here to see answer by ankor@dixie-net.com(16527)

 Question 478720: find all numbers for which the rational expression is undefined - 8/15x Click here to see answer by Tatiana_Stebko(1410)

 Question 478774: What is the degree of the given polynomial? 3x^9 + 4x^7 + 6x - 9 Click here to see answer by Tatiana_Stebko(1410)

 Question 478817: I can not figure out how to get rid of my denominator...do i multiply by the reciprocal or square root or something else...I am struggling to even begin. I sub in (1) for all X-values correct? Find the value of the function: f(1) when f(x)=(x^2-5)/ (x+3) Please show how this is done. Thanks! Click here to see answer by Alan3354(34679)

 Question 478831: Hello. My question is determine whether x-1 or x+1 is a factor of . I know this includes polynomial division, and I assume it has to do something about how x^100 is raised to an even root. Thanks in advance Click here to see answer by ewatrrr(11176)

 Question 478860: We are given a polynomial equation and one or more of its roots. Find the remaining roots. Roots are x=-4 and x=1 Click here to see answer by ewatrrr(11176)

 Question 478857: Hello. My question is When a polynomial P(x) is divided by 2x+1, the quotient is and the remainder is 3. Find P(x). Thanks in advance. Click here to see answer by Edwin McCravy(9719)

 Question 478916: A gardener wants to create a rectangular garden with length of 9x - 5y ft. and width of x - 6y ft. What is an algebraic expression for the area of the garden? Click here to see answer by cleomenius(959)

 Question 478912: Is 4x^2 – 16 the difference of two squares? Is so, how does it factor? Click here to see answer by Earlsdon(6294)
 Question 478912: Is 4x^2 – 16 the difference of two squares? Is so, how does it factor? Click here to see answer by cleomenius(959)

 Question 479020: Find the sign of the following expression: -(c-b)^3(a-c)^2 Click here to see answer by stanbon(60778)

 Question 479025: Let a, b, c be real numbers with properties a>0, b>0, and c<0. Discuss how to find the sign for the following expression: (a^2c^3/b^-3 c^4)^-2 Click here to see answer by stanbon(60778)

 Question 479056: I need help on how to do this problem.... If x= 6 and y= 4, then xy-3x=? plzz help mii step by step Click here to see answer by Alan3354(34679)
 Question 479056: I need help on how to do this problem.... If x= 6 and y= 4, then xy-3x=? plzz help mii step by step Click here to see answer by oberobic(2304)

 Question 479094: After solving the polynomial (2x^2+11xy-15)+(6x^2-6x+2)-(-x^2-y-5), I came up with the answer as 9x^2+11xy-6x-y-8. But I don't know how to correctly order the variables inside the answer. I am pretty such that the highest power of x would go first, but how do you know if the xy or just the x would go first? Click here to see answer by mananth(13127)

 Question 479303: Could you please help me with this problem? I am very confused about ratios. Three numbers are in ration of 2:5:3. The sum of the numbers is 120. Find the three numbers. Click here to see answer by Tatiana_Stebko(1410)

 Question 479308: I have to factor that out and I'm not sure how to do it Click here to see answer by Alan3354(34679)
 Question 479308: I have to factor that out and I'm not sure how to do it Click here to see answer by stanbon(60778)

 Question 479310: given that , I need to complete the factorization of by using the difference of squares Thanks! Click here to see answer by stanbon(60778)
 Question 479310: given that , I need to complete the factorization of by using the difference of squares Thanks! Click here to see answer by Alan3354(34679)

 Question 479360: The reciprocal of a number plus the reciprocal of twice the number equals 3/10 Find the number. please Click here to see answer by edjones(7794)

 Question 479467: find the LCM- 14b^6a^5,2b^5a^6, 35b^5a^5 I got as far as 7 goes into 14 and 35, which I got 2b^6a^5, and 5b^5a^5, not sure where to go from here Click here to see answer by stanbon(60778)

 Question 479485: create a polynomial function with the following charateristics and persuade your reader that your polynomial really does work work as intended! there is more than one possible solution. A. odd degree B. as x is postive infintie and y is neg infinte C. at least two roots each with a odd multiplicty D. y intercept is negative..... I know that the leading coeffiecent has to be - and x has to be raised to an odd number but i am having trouble figuring out the rest of it Click here to see answer by stanbon(60778)

 Question 479540: Hi, Here is my troublesome question: What is x if: log(subscript x)(16) = -2. I think the term subscript is correct but if not there is a small x to the lower aspect of "log." Hope this makes sense! Please and thanks! Click here to see answer by nerdybill(7090)

 Question 479625: (2a+5)/(b+5) + (-8a+1)/(b+5) I combined the like terms in the numerator and kept the (already) common denominator: (-6a+6)/(b+5) The result can not be simplified (no common factors), but do I need to factor the numerator? (Or is the answer correct as written?) If so, would both these answers be correct? [-6(a - 1)]/(b+5) or [6(-a + 1)] / (b+5) Thanks for your help. Click here to see answer by MathLover1(7480)