# Questions on Algebra: Quadratic Equation answered by real tutors!

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 Quadratics: solvers Practice! Answers archive Lessons Word Problems In Depth

 Question 6027: y2 -2y =24 Click here to see answer by Abbey(339)

 Question 6032: x2 +8x -84 =0 Click here to see answer by Abbey(339)

 Question 6035: x2 +8x -84 =0 Click here to see answer by Abbey(339)
 Question 6035: x2 +8x -84 =0 Click here to see answer by CharStar(110)

 Question 6040: t2 + 3t -8 =0 Click here to see answer by Abbey(339)

 Question 6046: 5x2 +16x + 3 =0 Click here to see answer by Abbey(339)

 Question 6044: y2 +6y +9 =0 Click here to see answer by Abbey(339)

 Question 6045: a2 = 16 Click here to see answer by CharStar(110)
 Question 6045: a2 = 16 Click here to see answer by dizzydee53538(2)
 Question 6045: a2 = 16 Click here to see answer by xcentaur(357)

 Question 6050: 3a2 -a +3 =0 I only need to solve this in QF and don't need to find the discriminant. Click here to see answer by Abbey(339)

 Question 6064: y2 +6y +9 =0 I only need to solve this in QF and don't need to find the discriminant. Click here to see answer by Abbey(339)

 Question 6051: y2 +6y +9 =0 I only need to solve this in QF and don't need to find the discriminant. Click here to see answer by Abbey(339)

 Question 6065: y2 +6y +9 =0 I only need to solve this using QF and don't need to find the discriminant. Click here to see answer by Abbey(339)

 Question 6052: a2 = 16 I only need to solve this in QF and don't need to find the discriminant. Click here to see answer by Abbey(339)

 Question 6082: y2 + 6y +9 =0 I only need to solve this using QF and don't need to find the discriminant. Click here to see answer by Abbey(339)

 Question 6081: 3a2 -a +3 =0 I only need to solve this using QF and don't need to find the discriminant. Click here to see answer by Abbey(339)

 Question 6080: 3x2 +x -2 =0 I only need to solve this using QF and don't need to find the discriminant. Click here to see answer by Abbey(339)

 Question 6089: 6a2 +2a +1 =0 I only need to solve this using QF and don't need to find the discriminant. Click here to see answer by Abbey(339)

 Question 6092: y2 +6y +9 =0 I only need to solve this using QF and don't need to find the discriminant. Click here to see answer by Abbey(339)

 Question 5211: I've been working on word problems, but this one has me stumped. A car travels 120 miles. A second car; traveling 10 mph faster than the first car, makes the same trip in one hour less time. Find the speed of each car. Click here to see answer by glabow(165)

 Question 5955: david`s father is two year old than his mother and his mother`s age is the square of his age. They years adds up to 80 years.How old is each one of them? Click here to see answer by glabow(165)

 Question 5069: x/x-1 + 2/x-5=-4/(x-1)(x-5) solve the eqution for x Click here to see answer by guapa(62)

 Question 6194: Hello I need to solve the following problem: A company uses the function: C(x) = 2x2 – 40x + 250 to model the cost of producing x units. How many units must be made to minimize the cost? Thanks much Mhunter Click here to see answer by Abbey(339)

 Question 6219: The area of a rectangular piece of concrete is 120 square feet, and its perimeter is 46 feet. What are the dimensions of the rectangle? Click here to see answer by minerva(22)
 Question 6219: The area of a rectangular piece of concrete is 120 square feet, and its perimeter is 46 feet. What are the dimensions of the rectangle? Click here to see answer by arunpaul(104)

 Question 6254: This problem states to factor each expression, I do not see how the derived. Here is the problem: ax^3 + bx^3 + 2ax^2y + 2bx^2y This is the answer from the book: x^2(a + b)(x + 2y) Please show me the steps to get this answer. Help. tsj Click here to see answer by Earlsdon(6294)

 Question 6255: I am not certain how you get the answer for this, will you please show each step. The Problem: ar^2 - brs + ars - br^2 I worked some of the problem: ar^2 - brs + ars - br^2 = ar^2 + ars - brs - br^2 = a(r^2 + rs) -b(rs - r^2) = (r^2 + rs)(rs - r^2)<-did the"a" and "-b" cancel out?. This is the textbook's anwser: r(r + s)(a - b) I am not understanding, please help. tsj Click here to see answer by Earlsdon(6294)

 Question 6256: I am totally lost on this problem, please explain and show the steps. Here is the problem: 2m^2n^2 - 32mn^2 + 8m^2 - 128 I thought the factor of this expression would be "2", but I lost and I do not understand how this is the answer: 2(m + 4)(m - 4)(mn^2 + 4) Confused tsj Click here to see answer by rapaljer(4667)

 Question 6253: I need help with this problem, I am evidently missing a step. Here is the problem: 3x^2(r + 3s) -6y^2(r + 3s) The answer in the book is: 3(r + 3s)(x^2 - 2y^2) I can not figure out how this is the answer, will you please show each step. Thanks. tsj Click here to see answer by rapaljer(4667)

 Question 6053: 5x2 +16x +3 =0 I only need to solve this in QF and don't need to find the discriminant. Click here to see answer by jst_kidding(6)

 Question 6278: x+y=16 x-y=0 Click here to see answer by Khaqan Majeed(2)

 Question 6277: a^2+6a+8=0 Click here to see answer by Khaqan Majeed(2)

 Question 6234: (4x-3)2+(4x+3)2=26 Click here to see answer by ichudov(499)

 Question 6296: Hello I am trying to solve the following: A company has a profit function: P(n) = -3n2 + 36n + 80 to model the profit (in \$1000) in selling n units. How many units must be sold to maximize the profit? I am stuck as to how to begin. To maximize profits you would want an infinite number of units sold...??? What do I set my = to? Click here to see answer by Earlsdon(6294)

 Question 6373: the length of a rectangular garden is 1 ft less than 3 times its width. If the perimeter of the garden is 46 ft, what is the dimensions of the garden Click here to see answer by minerva(22)

 Question 6396: I have a complete factorization problem. The question asks for the complete factorization of 14xsquared-7xcubed How do you do these???? Thank you!! Click here to see answer by rapaljer(4667)

 Question 6388: 9a2+42a+49 what are the two numbers Click here to see answer by rapaljer(4667)

 Question 6386: solve: x2+6x-12=0 I've tried factoring and can't come up with any factors. Also tried completing the square x2+6x+9=21 (x+3)(x+3)=21 can't get a number from there Also tried plugging into quadratic equation but the square root was of a number that wasn't a perfect square and didn't know how to express. Can you helpz? Click here to see answer by rapaljer(4667)

 Question 6414: x/5-x/3=8/15 Click here to see answer by longjonsilver(2297)
 Question 6414: x/5-x/3=8/15 Click here to see answer by digitalbeachbum(7)

 Question 6395: I was given a problem written like this; I'm going to write out the cubed and squares for lack of a better way. These statements refer to the numbers or letters before them. The problem was written all together. For all of a and b... 105acubedb+27asquaredbsquared-33abcubed Click here to see answer by longjonsilver(2297)

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