Post a New Question

algebra 1

posted by .

find a value for k that will make 4x^2 + 6.4x + k a perfect square. describe the procedure that you used which requires algebra. I have the answer and it is k = 1.6^2 or 2.56 i just don't get how we got there

  • algebra 1 -

    I gave you the answer yesterday. I picked 2.56 because
    4x^2 + 6.4x + 2.56 = (2x + 1.6)^2
    is a "perfect square", as you can verify by multiplication.

    1.6 is the number which, when multiplied by twice the square root of 4 (the first coefficient) gives the second coefficient, 6.4.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Algebra 2

    Replace each of the question marks with a value that will make the polynomial a perfect square trinomial. 1. 4x^2+12x+?
  2. Algebra

    what is a perfect square number i know 9, 25 and 100, but what else if you multiply a perfect square by a perfect square, is the answer always a perfect square
  3. algebra 1

    find a value for k that will make 4x^2 + 6.4x + k a perfect square. again this stuff is kicking my behind
  4. Algebra 1

    m(squared)-8m+n Find the value on n such that each expression is a perfect square trinomial.
  5. college algebra

    how to solve this problem. Completing the square. Find the value of a such that u^2-8u+a is a perfect square
  6. algebra

    FIND THE VALUE OF K, SO THAT THE EXPRESSION IS A PERFECT SQUARE TRINOMIAL. x^2+6x+k k=
  7. Algebra 1

    1. What is the excluded value for the rational expression x^2 - 4/3x - 6?
  8. 10th algebra

    x2+22x +c find the value of c that makes the trinomial a perfect square
  9. Algebra

    What is the value of c so that y=x^2+9x+c is a perfect square trinomial?
  10. Algebra

    y^2-7y+p. Find the value of p that it becomes a perfect square algebra

More Similar Questions

Post a New Question