# 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 85273: factor 3a^2(a-b)-6a(a-b)+21(a-b) A) 3(a-b)(a^2-2a+7) B) (3a-b)(a^2-2a+7) C) (a-b)(3a^2-6a+21) D) 3(a-b)(a^2-6a+21) Click here to see answer by stanbon(57337)

 Question 85401: problem is to find all numbers for which each rational expression is undefined. If the rational expression is defined for all real numbers, it says, so state. x+3 over(x-2)(x+5) 7 over X^2 + 81 this one is also in fraction form Click here to see answer by bucky(2189)
 Question 85401: problem is to find all numbers for which each rational expression is undefined. If the rational expression is defined for all real numbers, it says, so state. x+3 over(x-2)(x+5) 7 over X^2 + 81 this one is also in fraction form Click here to see answer by scianci(186)

 Question 85318: (-v^3-v^2-1)- (v^4-v^2-v-1)+(v^3-3v^2+6) How to preform this operation ? Click here to see answer by scianci(186)

 Question 85270: divide x^3+2x^2+x+12 over x+3 A) x^2+x-4 B) X^2-x-4 C) X^2-x+4 D) X^+x+4 Click here to see answer by scianci(186)

 Question 85133: which of the following is not a polynomial? 24 4x^3+5x-1 2x-1/x 3xy^2+xy Click here to see answer by scianci(186)

 Question 85465: Hi wondering if someone can solve these problems:These are multiplying and dividing rational expressions. y^2-2y+1 over y^2 -1 times 2y^2 + y-1 over 5y -5 and another one 8x + 8y over x^2 divided by x^2-y^2 over x^2 thanks for any help you can offer Click here to see answer by Earlsdon(6287)

 Question 85485: Can you help me on this problem? 2x + -2x = 0 Or is it 2x? I cam up with 0, because the two's cancel eachother out. Click here to see answer by stanbon(57337)

 Question 85482: I'm confused about Negative exponents & Scientific Notation. My book shows a positive exponent moving the decimal point to the right but the arrows are pointing left and it says the negative exponent moves the decimal point left however, it shows the arrow moving right. Example: 120,000. = 1.2 x 10(the power is 5.)Then under the 120,000 the arrows <----- (5 places) are moving to the left. Can you help me understand this please? Click here to see answer by stanbon(57337)

 Question 85567: If a 4.4 pound of dog food costs \$3.52, what is the cost per pound? Click here to see answer by jim_thompson5910(28595)

 Question 85566: list the terms of the following exprissions 5q^2-q+9 Click here to see answer by jim_thompson5910(28595)

 Question 85585: adding and subtracting rational expressions. 8x-5 over 3x-1 + 4x+1 over 3x-1 a subtraction one x+5 over x-3 - x over 3-x Click here to see answer by stanbon(57337)

 Question 85626: I am trying to solve this word problem; If one-half of are integer subtracted from three fifths of the next consecutive integer, the difference is 3. I wrote this expression like this? 1/2 x-3/5 x-3= and the two integers are 9, 31 is this correct and am I on the right track? Click here to see answer by stanbon(57337)

 Question 85631: I have a complex fraction, but I think I understand. please tell me. w+3/4w ______ w-3/2w I am being asked to solve, this is what I have =w+3/4w x 2w/w-3=6w/-12w. is this correct? Click here to see answer by stanbon(57337)

 Question 85641: This word problem consists of combining resistance of two resistors R^1 and R^2 in a parallel circuit is given by the formula R^T=1/[1/R^1+1/R^2] this is asking to simplify the formula not sure how to do this a little lost. Click here to see answer by stanbon(57337)

 Question 85668: 2/5=x-2/20 Solve for x..How am I supposed to do this? I am so confused. Click here to see answer by ankor@dixie-net.com(15650)

 Question 85672: Subtract the following 5 over X^2-16 - 3 over X^2-x-12 - Click here to see answer by scianci(186)

 Question 85667: How do I solve and check for x with the following equation?: 5/x+6+2/x^2+7x+6=3/x+1 Click here to see answer by Nate(3500)

 Question 85589: i need help on factoring this problem completely. 6x^-15x^4-36x^3 Click here to see answer by checkley75(3666)