math

posted by Robert

factorise 1-16(1-y)^2
please help me

  1. Reiny

    difference of squares

    = (1 + 4(1-y) )(1- 4(1-y))
    = (1 + 4 - 4y)(1-4 + 4y)
    = (5-4y)(4y - 3)

  2. Bobby

    I am very good at maths, I am estimated to get an A+, but I hate turning point questions.

    How do you find the turning point when given the quadratic function?

    f(x)=(x+3)^2 - 16
    Write down the co-ordinates of the turning point on the grap of y=f(x)

  3. Robert

    given a GP below, find the values of m, and the next 2 terms:
    m, m+3, m^2+3
    Help me please

  4. Reiny

    For a quadratic function , the turning point would be the vertex of the parabola.
    since your equation is written in vertex form
    f(x) = (x+3)^2 - 16
    the vertex is (-3,-16) , which would be your turning point.

    If your quadratic is written in the form
    f(x) = ax^2 + bx + c
    there is a quick way to find the vertex
    the x of the vertex is -b/(2a)
    once you have that x, sub it into the equation to get the y
    e.g.
    y = 3x^2 + 9x - 11
    the x of the vertex is -9/6 = -3/2
    then y = 3(9/4) + 9(-3/2) - 11
    = 24/4 - 54/4 - 44/4
    = -37/2
    the vertex or turning point is (-3/2 , -37/2)

  5. Reiny

    if m , m+3, m^2 + 3 are in geometric progression, then

    (m+3)/m = (m^2 + 3)/(m+3)
    m^3 + 3m = m^2 + 6m + 9
    m^3 - m^2 - 3m - 9 = 0

    normally cubics are hard to solve, but I tried factors of 9
    and found m = 3 to work

    so the numbers are 3, 6, 12
    so each number is double its previous one, r = 2
    the next 2 numbers are 24 , 48

Respond to this Question

First Name

Your Answer

Similar Questions

  1. factorising

    how do you factorise? for example putting 2x² + x - 3 into the form (2x + 3)(x - 1) factorise 9x to the power of 4 - 64y to the power of 2
  2. math

    help my daughter has a math problem and came to me for help, I am lost.... what is the gcf for the following trinomial?
  3. math

    factorise 1. 3a^2 - 2a - 8 2. 3x^2 + 31 + 10 3. 64y^2 - 49 please help thankyou
  4. math

    factorise 7x^2 - 19x + 10 13x - 20 - 2x^2 28n - 10 + 6n^2 please can you show me the method thanks
  5. Maths

    How to do factorise ? What is Factorise ?
  6. math

    help please! Factorise (x+4)(3x^2-11x+6)
  7. math

    please factorise 100-9x^2
  8. Math

    Please help Factorise fully 1. X^2-5x-14 2. Ab^2+3b 3. A^3-8a^2+15a
  9. Maths factorise

    Factorise 3px-3py-x+y
  10. Business Math

    a) Solve for x: 2x² + 5x = 3 b) Solve for x and y: x + y = 4 and x² + y² + xy - 12 =0 c) Solve for x: 8 2x + 3 = ½x² d) Factorise: 6x² - 7xy - 3y² e) Factorise: 4x³ + 5x²y - 4xy² - 5y³

More Similar Questions