Ask Experts Questions for FREE Help !
Ask
    kathy1978's Avatar
    kathy1978 Posts: 1, Reputation: 1
    New Member
     
    #1

    Oct 15, 2010, 09:00 AM
    Solve x2 + 18x + 81 = 0
    Solve x2 + 18x + 81 = 0
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
     
    #2

    Oct 15, 2010, 09:53 AM

    What are the factors of 81 which add up to 18?
    lighunt's Avatar
    lighunt Posts: 4, Reputation: 1
    New Member
     
    #3

    Oct 27, 2010, 10:06 AM
    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.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
     
    #4

    Oct 27, 2010, 10:29 AM
    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:

Not your question? Ask your question View similar questions

 

Question Tools Search this Question
Search this Question:

Advanced Search


Check out some similar questions!

Solve [(86400*n^2)/2^n]<1 solve n [ 3 Answers ]

Could you Please solve this problem <1 solve n

Solve [ 1 Answers ]

The population of a certain country is growing at a rate of 2.3% per year. How long will it take for this country's population to double? Use the formula which gives the time, t, for a population with growth rate k, to double. (Round to the nearest whole year.) 29 years 30 years ...

Solve for x? [ 2 Answers ]

Yikes! I just got this review sheet for a final in algebra for 9th grade here is the promblem: SOLVE FOR X. nx-m=p Can somebody talk me through on how to do this and the answer would be terrific. Thank you!

Solve for why [ 1 Answers ]

y_2+3y=10


View more questions Search