math

posted by .

if x-2 is a factor of polynomial x cube - 2ax square + ax - 1 what is the value of a ??

  • math -

    let f(x) = x^3 - 2ax^2 + ax - 1
    if x-2 is a factor, then f(2) = 0
    f(2) = 8 -8a + 2a - 1 = 0
    -6a = -7
    a = 7/6

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. calc

    find the values of a nad b if the function f(x)=2x^3 + ax^2 + bx + 36 has a local max when x=-4 and a min when x=5 First you calculate the derivative: f'(x)=6x^2 + 2ax + b (1) At the local maximum and minumum f' is zero. If a polynomial …
  2. polynomials

    i also have theses to solve Factor the polynomial x2 + 5x + 6 completely Solve the given equation by using the quadratic formula. x2 – 7x – 4 = 0 What value is under the square root (or radical) in your answer?
  3. math

    Factor the following. You will earn 5 points for each polynomial that is factored correctly. Please label your individual answers with a - f. a.) 4x2 - 25 b.) 3x2 + 6y c.) x2 - 7x + 10 d.) 2x2 - 9x - 18 e.) 2ax + 6bx + ay + 3by f.) …
  4. algebra

    Volume of a Box (Refer to the preceding exercise.) A box is constructed from a square piece of metal that is 20 inches on a side. (a) If the square corners of length x are cut out, write a polynomial that gives the volume of the box. …
  5. algebra

    Volume of a Box A box is constructed by cutting out square corners of a rectangular piece of cardboard and folding up the sides. If the cutout corners have sides with length x, then the volume of the box is given by the polynomial …
  6. algebra

    what value makes the polynomial factor as a perfect square x+12+?
  7. maths

    simplify the following expression without using calculator. -2(-4a squared + b cube) square ........ -2 (-4a squared + b cube)(-4a squared + b cube) -2 (16a square - 4a square b cube + b cube) -2 (+ 16 a square = b cube ) -32a square …
  8. law of exponents

    simplify the following expression without using calculator. -2(-4a squared + b cube) square ........ -2 (-4a squared + b cube)(-4a squared + b cube) -2 (16a square - 4a square b cube + b cube) -2 (+ 16 a square = b cube ) -32a square …
  9. algebra--1 question

    Suppose you divide a polynomial by a binomial. How do you know if the binomial is a factor of the polynomial?
  10. math check my answers please

    What is the smallest perfect square that has a factor of 800. What is the smallest perfect cube that has a factor of 800?

More Similar Questions