# 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 624872: Solve the following equation by using an appropriate substitution (x^2-x)^2-18(x^2-x)+72=0 Click here to see answer by Maths68(1474)

 Question 624934: Please someone help me with this problem : In solving the equation (x+3)(x-3)- 8, Eric stated that the solution would be x + 3 - -8 - 7x = -11 or (x - 3) = -8 =7x = -5 However, at least one of these solutions fails to work when substituted bach into the original equation. Why is that? Please help Eric solve the problem Click here to see answer by Alan3354(30993)

 Question 624936: Please someone help me with this problem: If a stone is tossed from the top of a 170 meter building, the height of the stone as a function of time is given by h(t) = -9.8ft^2 - 10t + 170. where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest hundreth place, include units in your answer. Click here to see answer by Alan3354(30993)

 Question 624941: Please can someone help me with this problem: solve using substitution method. If the system has no solution or an infinite number of solutions state this. 3x + 24y = 24 27x - 15y = -15 Click here to see answer by MathTherapy(1425)

 Question 625010: What degree would a polynomial of lowest degree be with rational coefficients which has 2, 31/2 , and 2i as zeroes? Click here to see answer by jim_thompson5910(28598)

 Question 624615: A triangle is 8cm wider than it is tall the area is 280cm^2. find the width Click here to see answer by Aztec(6)

 Question 625084: If one zero of the function y= x^2 + mx + n is the square of the other, without finding the zeroes, prove that m^3 = n(3m - n - 1). Thanks in advance. P.S: Is there a method of proving without substitution involved? Click here to see answer by oscargut(891)

 Question 624942: Please can someone help me with this problem: Solve using the elimination method. 14x + 18y = -54 -4x - 14y = 42 Click here to see answer by opeodu(24)

 Question 625205: if x=3 what is the evaluation for this polynomial 2x^3-3x^2+1 Click here to see answer by jim_thompson5910(28598)

 Question 625271: Place the indicated product in the proper location on the grid. (x^2 + 4)(x^2 - 4) Click here to see answer by jsmallt9(3296)

 Question 625244: Which of the following is equal to the rational expression when x≠4 or -9? (x-4)(x+11)/(x+9)(x-4) Click here to see answer by jsmallt9(3296)

 Question 625325: To collect funds, the organization is holding a football match between teachers and varsity players. Each ticket costs 2x + 3y for students and 3x - 5y for non-students. What is the total earning if 2x - 3y students and 3x + 5y non-students would attend? Click here to see answer by jsmallt9(3296)

 Question 625525: I need to simplify this as much as possible: (s+(1)/(4))*(s+(1)/(3)) In other words (s + (one-fourth))*(s + (one-third)) = I got ((3s+1)(4s+1))/(12) as a fraction - Am I right or did I miss something? Thank you! Click here to see answer by Maths68(1474)

 Question 625532: Find the product for these expressions: 1. {(x+3) + y}^3 2. (a^(x+1) + b^(x-2))(a^(x+1) - b^(x-2)) In number 2, I came up with a^(x+1)^2 - b^(x-2)^2 but am little apprehensive about this. I hope you can enlighten me on both numbers. Click here to see answer by jsmallt9(3296)

 Question 625682: 1. c=rd 2. 2(x+3)=0 3. x+3x²=0 4. x+y=5 5. 3x-2=0 6. x²-2x-5=0 Click here to see answer by solver91311(16897)