Author Topic: Modulas (Read 1073 times) Tweet Share

chuckjefster90 · « **on:** October 08, 2009, 06:29:21 pm »

How do u find relevant intervals and solve abs(x^2-4)-5 alebraically?

Flaming_Arrow · « **Reply #1 on:** October 08, 2009, 06:32:37 pm »

|x^2-4|=5

x^2-4=5 and x^2-4=-5
x^2-9 and x^2+1=0

x= +-3

chuckjefster90 · « **Reply #2 on:** October 08, 2009, 06:40:40 pm »

TrueTears · « **Reply #3 on:** October 08, 2009, 09:54:29 pm »

|x^2-4|=5

x^2-4=5 and x^2-4=-5
x^2-9 and x^2+1=0

x= +-3

But also be careful to remember the domain for each hybrid function

kamil9876 · « **Reply #4 on:** October 08, 2009, 10:05:40 pm »

^ he didn't do it like that. A very good and quick way, no need to worry about domain, that would be a round about way.

TrueTears · « **Reply #5 on:** October 08, 2009, 10:06:21 pm »

^ he didn't do it like that. A very good and quick way, no need to worry about domain, that would be a round about way.

I know but didn't OP said "find relevant intervals"

kamil9876 · « **Reply #6 on:** October 08, 2009, 10:07:19 pm »

oh yeah lol i just focused on the reply and it looked like he was solving

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