Khan/khan-exercises — Issue #7090: Completing the square 1 - sloving this question: x 2 +12x+27=0
Author: KhanBugz
Created: 2011-11-26 14:25:14+00:00
State: open
Labels: ie8, other, win7

Reporter: debi_duodu@hotmail.co.uk

When sloving x^2 +12x+27=0 my answers was x=-3 and x-9 which I'm sure is correct but when I clicked check answer an unhappy face appeared which I did not understand. I appreciate it someone could get back to me about this problem. Thank you

[completing_the_square_1.html?seed=149&problem=original](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/completing_the_square_1.html?seed=149&problem=original&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/completing_the_square_1.html?seed=149&problem=original&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%22-3%5C%22%2C%5C%22-9%5C%22%5D%22%2C338%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%22-3%5C%22%2C%5C%22-9%5C%22%5D%22%2C2%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%22-3%5C%22%2C%5C%22-9%5C%22%5D%22%2C180%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%22-3%5C%22%2C%5C%22-9%5C%22%5D%22%2C11%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%223%5C%22%2C%5C%229%5C%22%5D%22%2C8%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%223%5C%22%2C%5C%22minus%209%5C%22%5D%22%2C71%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%22minus3%5C%22%2C%5C%22minus%209%5C%22%5D%22%2C8%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%22.3%5C%22%2C%5C%22.9%5C%22%5D%22%2C17%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%223%5C%22%2C%5C%22.%5C%22%5D%22%2C64%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%223%5C%22%2C%5C%229%5C%22%5D%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C10%5D%2C%5B%22hint-activity%22%2C%220%22%2C13%5D%2C%5B%22hint-activity%22%2C%220%22%2C14%5D%2C%5B%22hint-activity%22%2C%220%22%2C15%5D%2C%5B%22hint-activity%22%2C%220%22%2C15%5D%5D)

[["-3","-9"],["-3","-9"],["-3","-9"],["-3","-9"],["3","9"],["3","minus 9"],["minus3","minus 9"],[".3",".9"],["3","."],["3","9"]]

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Win64; x64; Trident/4.0; GTB7.2; EasyBits GO v1.0; .NET CLR 2.0.50727; SLCC2; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; MATM)

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