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Preid, you wrote the 2nd wrong.
But it's answer is(2x^2-5)(6x+1)
But it's answer is(2x^2-5)(6x+1)
+6
jj16802
Fangy
Jewelz
Justice
Ahmed
preid1220
10 posters
algebra/trig2
Dark Flame99966- NH Member
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Dark Flame99966- NH Member
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And the third is
2x-7|<9
x= 8 or -1
2x-7|<9
x= 8 or -1
preid1220- NH Moderator
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i did not wright it wrong, i gave you what i was given.
Ahmed- NH Admin
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I already did the third, flame: 0 is less than or equal to x. x is less than or equal to 4.
Dark Flame99966- NH Member
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Then what you were given is wrong because it's trying to get you to factor four terms but that doesn't work right if the 2nd isn't to the 2nd power
Dark Flame99966- NH Member
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I have no idea how you got that Ahmed
Ahmed- NH Admin
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Well think about it.
If I plug in 0 (zero). It would still be true. Yet that's not in your answer.
Dark Flame99966 wrote:And the third is
2x-7|<9
x= 8 or -1
If I plug in 0 (zero). It would still be true. Yet that's not in your answer.
Dark Flame99966- NH Member
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Because I was taught to find two definite answers and it's assumed that anything in between works.
Ahmed- NH Admin
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^^^Very wrong. You said "x= 8 or -1". That means that assumption isn't valid anymore.
But besides that, yes your answer of 8>x>-1 is correct. I solved it incorrectly. (Misread it)
But besides that, yes your answer of 8>x>-1 is correct. I solved it incorrectly. (Misread it)
Dark Flame99966- NH Member
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Okay, x= 8 AND -1
Happy?
Happy?
Ahmed- NH Admin
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No. That is still wrong.
8>x>-1 is correct.
You could also do this in set notation or graph it. But using AND or OR in this question would be wrong.
8>x>-1 is correct.
You could also do this in set notation or graph it. But using AND or OR in this question would be wrong.
Justice- NH Member
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Guys stop arguing let me take a look...
Ahmed- NH Admin
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And what did you find doctor?
Doc- NH Member
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u guys r losers
Dark Flame99966- NH Member
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<_<
My teacher always made us use and or OR rather than need interval notation.
My teacher always made us use and or OR rather than need interval notation.
Justice- NH Member
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2x^2-18x-72=
2(x-12)(x+3)
12x^3+2x-30x-5=
12x^3- 28x-5
|2x-7|<=9
-1<= x <= 8
2(x-12)(x+3)
12x^3+2x-30x-5=
12x^3- 28x-5
|2x-7|<=9
-1<= x <= 8
preid1220- NH Moderator
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got another one for y'all,
show all work and every possible answer type... i hate my math teacher
|x-3|<2x-4
show all work and every possible answer type... i hate my math teacher
|x-3|<2x-4
Ahmed- NH Admin
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x-3<2x-4
x>1
x-3>-2x+4
x>7/3
x>1
x-3>-2x+4
x>7/3
jj16802- NH Moderator
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Who do you have, Lessig? I think we're way ahead of you.preid1220 wrote:got another one for y'all,
show all work and every possible answer type... i hate my math teacher
|x-3|<2x-4
preid1220- NH Moderator
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no, this was on a review ditto for a test tomorrow and my answers didn't match up with what was on the answer key... but Laluna is an poor teacher and makes alot of mistakes so i thought i should check with you guys.
also Ahmed
x-3>-2x+4
that would become 3x>1 right? how does that reduce to 7/3? (I wish i dint sleep in class two years ago.)
also Ahmed
x-3>-2x+4
that would become 3x>1 right? how does that reduce to 7/3? (I wish i dint sleep in class two years ago.)
Ahmed- NH Admin
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x-3>-2x+4
x>-2x+7
3x>7
x>7/3
x>-2x+7
3x>7
x>7/3
preid1220- NH Moderator
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o i see now, i was treating the -3 as a +3
Dark Flame99966- NH Member
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Preid, this is simple stuff 
Even I know this and I'm a freshman (though admittedly I already took algebra 2)
Even I know this and I'm a freshman (though admittedly I already took algebra 2)
preid1220- NH Moderator
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Dark Flame99966 wrote:Preid, this is simple stuff
ye, I'm messing up because I'm trying to hard and forgetting my basics =P
Ahmed- NH Admin
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You must construct additional pylons.
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