Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Math & Sciences (https://www.askmehelpdesk.com/forumdisplay.php?f=402)
-   -   Solve x2 + 18x + 81 = 0 (https://www.askmehelpdesk.com/showthread.php?t=516946)

  • Oct 15, 2010, 09:00 AM
    kathy1978
    Solve x2 + 18x + 81 = 0
    Solve x2 + 18x + 81 = 0
  • Oct 15, 2010, 09:53 AM
    Unknown008

    What are the factors of 81 which add up to 18?
  • Oct 27, 2010, 10:06 AM
    lighunt
    You basically need X2 and 18X to add up to a negative 81. So subtract 81 from both sides to create the equation of X2 + 18X = -81. Now add X2 + 18X. This will create the equation of 20X = -81. Now divide 20 on both sides... X = -4.05.
  • Oct 27, 2010, 10:29 AM
    Unknown008
    Quote:
    Originally Posted by lighunt View Post
    You basically need X2 and 18X to add up to a negative 81. So subtract 81 from both sides to create the equation of X2 + 18X = -81. Now add X2 + 18X. This will create the equation of 20X = -81. Now divide 20 on both sides...X = -4.05.
    This is not the correct answer. :rolleyes:

    • All times are GMT -7. The time now is 04:43 AM.