Wednesday
May 22, 2013

# Homework Help: math

Posted by kiearra on Sunday, January 4, 2009 at 3:10pm.

solve the inequality using any method
x^2-8x+12<0

• math - Ms. Sue, Sunday, January 4, 2009 at 3:14pm

Princess, Key, or whoever you are -- it's disconcerting to see three similar problems in a row -- all from the same computer. Please stick with one name so that our tutors can help you better.

• math - Reiny, Sunday, January 4, 2009 at 3:40pm

x^2-8x+12<0
(x-6)(x-2) < 0
so we have "critical" values at x=6 and x=2

mark these on a number line, yielding 3 sections
x<2, test at x=0 in (x-6)(x-2)<0, no!
x between 2 and 6 , test at x=5, yes!
x > 6 , test at x=10, no!

so 2 < x < 6

• MS.Reiny and Sue - kiearra, Sunday, January 4, 2009 at 10:10pm

thank you reiny for helping me and my causins were useing my computer for help on there math homework also!!! so thank you from all of us

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