Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Math & Sciences (https://www.askmehelpdesk.com/forumdisplay.php?f=402)
-   -   Quadratic equation (https://www.askmehelpdesk.com/showthread.php?t=258275)

  • Sep 8, 2008, 05:27 PM
    yoohoo
    quadratic equation
    Two numbers have a difference of 3. the sum of their squares is 89.
    Find the numbers.
    Having difficulty please help
  • Sep 8, 2008, 05:46 PM
    Credendovidis
    Quote:

    Originally Posted by yoohoo
    two numbers have a difference of 3. the sum of their squares is 89.
    find the numbers.
    Having difficulty please help

    Call one number a
    The other number is a+3
    As per data a^2 + (a+3)^2 = 89

    a^2 + (a^2 + 6a + 9) = 89
    a^2 + a^2 + 6a +9 = 89
    2a^2 + 6a = 80
    a^2 + 3a = 40
    a^2 +3a - 40 = 0

    Just solve a from that, and you have both numbers.

    (you have to do something yourself... just see how the number 40 is build up... start dividing with two... Find two numbers that multiply to -40, but add up to +3)

    Easy, is it not ?

    :)

  • All times are GMT -7. The time now is 09:25 AM.