# 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 491202: Factor: x^3 - 3x^2 + 2x - 6 Click here to see answer by ptth176(50)

 Question 491839: i need to factor this polynomial completely 4z^3-12z^2-16z+48 Click here to see answer by stanbon(57347)

 Question 491895: evaluate square root of 81 over square root of 121 Click here to see answer by rfer(12660)

 Question 491888: f(x)=25xsquare2+20x+4 find the y intercepts and x intercepts Click here to see answer by ccs2011(207)

 Question 492004: Is this equation correct: (x y)^3 = x y^3 ? Explain why. If it is correct, how can you prove this? If it is incorrect, what should be done to make it right? Click here to see answer by ptth176(50)

 Question 492030: I need help with this problem 7^2 ___ 8^8 I come up with 1 _____ 117649 and my friend comes up with 1 ___ 7^6 could you please help me solve this problem? Click here to see answer by Theo(3464)

 Question 492056: How do I completely factor the following expression 81y^2 - 4z^2 Click here to see answer by nerdybill(6959)

 Question 492066: completely factor the expression 128x^2 + 192xy + 72y^2 Click here to see answer by stanbon(57347)

 Question 492203: I need to put this expression in simplest form but i'm not sure how to..its been a long time.. x^2-2x-15/x^2+3x Click here to see answer by chessace(471)

 Question 492452: Solve 9x^4-18x^2+5=0 If you can just show me how I should do it (as in the formula or the first few steps) that is all I need. Click here to see answer by scott8148(6628)

 Question 492181: Multiply (4x + 1)(2x^2 + x + 1) Click here to see answer by ptth176(50)

 Question 492676: how can you find the slope and y-intercept of the line y= -2/9x-6 Click here to see answer by mananth(12270)

 Question 492723: hi . the question that i have given to you is wrong . here is the new . please help to solve this because i need it tomorrow . tank you :) Click here to see answer by stanbon(57347)

 Question 492751: f(x) = 4/3 - 1/4X is this a polynomial? Click here to see answer by stanbon(57347)

 Question 492856: Can you show me how to factor: 8c^2-112c+392? Click here to see answer by Alan3354(30993)

 Question 492998: I need help with the following word problem: Janine bikes 3 mph faster than her sister, Jessica. Janine can ride 36 miles in 1 hr less time than Jessica can ride the same difference. Find each of their speeds. Here's what I have so far: 36/x - 1 = 36/x-3 36/x-1x/1x = 36/x-3 (36-x)(x-3) = (36) (x) 36x-108-x^2+3x = 36x -x^2+3x-108 = 0 I cannot figure out how to factor the -x^2+3x-108. Please help! Click here to see answer by Alan3354(30993)

 Question 493146: -f + 4 - 7f - 8 + 2f + 6 Click here to see answer by deborabr(181)

 Question 493151: How do I find a polynomial function with rational coefficients so that P(x)=0 has the given roots: 13i and 5 + 10i. I tried this: P(x)=(x+13i)(x^2 + 5 + 10) but when I multiply everything out it is Way off from the answer in the back of the book. Click here to see answer by scott8148(6628)

 Question 493602: i want notes about solutions of algebraic polynomials,existence of roots, iterative techniques(newtom raphson method) and linear interpolation Click here to see answer by Alan3354(30993)

 Question 493695: A rectangle has an area of x^2+8x+15 The length and with of the rectangle are Click here to see answer by stanbon(57347)

 Question 493752: add the following polynomials (2/3x^2 - 1/2x - 2/3) + (1/2x^2 + 1/4x - 1/2) Click here to see answer by rfer(12660)

 Question 493749: trying to solve the following expression: x^3+4x^2-2x ifx=3, and x=2 Click here to see answer by rfer(12660)

 Question 494366: simplify each expression. assume that no denominator are zero. (3x^5y^2/6x^5y^-2)^-4 Click here to see answer by chessace(471)

 Question 494606: when will the sum of two integers be equal to the difference between the two integers Click here to see answer by stanbon(57347)

 Question 494760: When simplifying the rational expression, explain why it is improper to cancel out the x’s Click here to see answer by solver91311(16885)

 Question 494725: 10. Essay; show all work. Consider that the age, x, of a unicorn in human equivalent years can be given by the formula f(x) = - 0.001518x4 + 0.067326x3 – 1.4367x2 + 12.46x + 2.914. When a unicorn is 2.5 years old, what is its age in human equivalent years? What about when it is 12 years old? Click here to see answer by richard1234(5390)

 Question 459723: Factor completely. Remember to look first for a common factor. If a polynomial is prime, state this. x^8-8x^7+16x^6 Click here to see answer by akyra1(1)

 Question 495197: Construct a table of possibilities of the roots of the given equation. 1) 9x^5-x^3+5x^2-x-4=0 Click here to see answer by richard1234(5390)

 Question 495174: Is this equation correct: (xy)3 = xy3 ? Explain why. If it is correct, how can you prove this? If it is incorrect, what should be done to make it right? Click here to see answer by richard1234(5390)

 Question 495259: 12a²-4a-16. I got this far 4(3a²-a-4) and I know that the answer is 4(3a-4)(a+1) but not sure how to get to that conclusion. Thank You Click here to see answer by Edwin McCravy(8909)

 Question 495583: Could someone please tell me if I am doing this right? Thank you soooo much! Simplify:(2x^5)^3(-3x^4)^3 This is what I got but I feel unsure of my answer. 2x^5*3 = 2x^15 -3x^4*3 = -3x^12 3*2x^15= 6x^15 -3x^12 * 3 = -9x^12 6x^15 * -9x^12 = -54x^27 = -54x^27 Click here to see answer by stanbon(57347)

 Question 495623: how do you simplify +X2 -X2 (the 2's are to the second power) Thanks Click here to see answer by Alan3354(30993)

 Question 495617: how do you simplify +x2 -x2 (the 2's are to the second power?) Click here to see answer by Alan3354(30993)