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akhl

@akhl

Dazzler

Posted: 13 years ago

#531

Originally posted by: priya_94
Need Help:l
got to divide this?
1). (x^3+2x^2-x-2)/(x+2)

Factorise
(x^3+2x^2-x-2)/(x+2)
= [x^2(x+2) - (x+2)]/(x+2)
= (x+2) (x^2 - 1)/(x+2)
(x+2) and (x+2) cancel out

= x^2 - 1 (Answer)

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596277

Suspended

Posted: 13 years ago

#532

Thanks so much Akhl with the biology questions :)

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akhl

@akhl

Dazzler

Posted: 13 years ago

#533

Originally posted by: priya_94
Need Help:l
got to divide this?
1). (x^3+2x^2-x-2)/(x+2)

If you want long division,

x^2 - 1
------------------------
x + 2) x^3 + 2x^2 - x - 2
x^3 + 2x^2
----------------------
-x - 2
-x - 2
-----------------------

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596277

Suspended

Posted: 13 years ago

#534

^ Akhl have you read the story "The Painted Door" by Sinclair Ross by chance?

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akhl

@akhl

Dazzler

Posted: 13 years ago

#535

Originally posted by: -Ayeshaa-
^ Akhl have you read the story "The Painted Door" by Sinclair Ross by chance?

No. Although my English is pretty good and I help students in it if they need, but I mostly spend time in teaching Science and Mathematics.

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Sonia

@Miggi

Inactive

Posted: 13 years ago

#536

hey i have a quick question.. i am making a dichotomous key for the identification of the microoganisms that i studied in lab .. i performed a number of tests like catalase oxidase etc i dunno if i have to include all the tests or should i use as less as possible tests for the identification.. thanks in advance.
and @ akhl thanks for ur help.. would u please do the rest of questions as well thanks once again

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596277

Suspended

Posted: 13 years ago

#537

Originally posted by: akhl

No. Although my English is pretty good and I help students in it if they need, but I mostly spend time in teaching Science and Mathematics.

Okay thank you Akhl :) I think I might need help with this essay I have to write on love, and it's what is true love? is it based on fantasy or does it actually exist?

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akhl

@akhl

Dazzler

Posted: 13 years ago

#538

@Miggi,
You should first do only the tests which are necessary to identify the microorganisms. Once the identification is complete, then if time permits, see what should be the results of the other tests. Quickly do the other tests to see if you really get those results. This is called confirmation.

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Sonia

@Miggi

Inactive

Posted: 13 years ago

#539

i already did all tests but do i need to add those extra ones in my dichotomous key e.g. if proteus vilgaris is negative for catalase test and other two microoirganisms are positive, now i have proteus vulgaris separated from other to microorganisms but do i still need to show other tests for proteus vulgaris on the dichotomous key??