Math Is Fun Forum

otherwiseknownaskyra

Member

Registered: 2014-04-08

Posts: 13

Factoring Polynomials of a Higher Degree

Hello, I submitted a lesson which was graded and I had six incorrect problems out of twenty that I need to revise for a grade so here they are:

1.

A.

B.

C.

D.

E.

F. cannot be factored

D.

(this is my revised answer, my original answer was A.)

5.

A.

B.

C.

D.

E.

F. cannot be factored

E.

(marked incorrect)

12.

A.

B.

C.

D.

E.

F. cannot be factored

Not sure where to go from here. My original guess was A.

14.

A.

B.

C.

D.

E.

F. cannot be factored

A.

(marked incorrect)

16.

A.

B.

C.

D.

E.

F. cannot be factored

A.

(revised answer, my original answer was D.)

17.

A.

B.

C.

D.

E.

F. cannot be factored

A.

(revised answer, my original answer was D.)

Any help on the incorrect ones and checking on the revised ones would be much appreciated

Last edited by otherwiseknownaskyra (2014-08-22 01:22:18)

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Making mistakes is a lot better than not doing anything. -Billie Joe Armstrong

otherwiseknownaskyra

Member

Registered: 2014-04-08

Posts: 13

Re: Factoring Polynomials of a Higher Degree

I would really appreciate if we could these worked out by tomorrow which is when my next Algebra class is

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Making mistakes is a lot better than not doing anything. -Billie Joe Armstrong

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Factoring Polynomials of a Higher Degree

Hi;

I am getting:

1) D

5) A

12) B

14) D

16) A

17) F

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

otherwiseknownaskyra

Member

Registered: 2014-04-08

Posts: 13

Re: Factoring Polynomials of a Higher Degree

Thank you, I had hoped I had figured that one out. Any idea on the others? Also, if you could tell me how to get the answer for the ones I have not figured out that would be great.

Last edited by otherwiseknownaskyra (2014-08-22 01:25:21)

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Making mistakes is a lot better than not doing anything. -Billie Joe Armstrong

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Factoring Polynomials of a Higher Degree

Check post #3, I will put my answers there.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

otherwiseknownaskyra

Member

Registered: 2014-04-08

Posts: 13

Re: Factoring Polynomials of a Higher Degree

Thanks! Also, I would like to know how you got your answers for 5, 12, and 14.

---

Making mistakes is a lot better than not doing anything. -Billie Joe Armstrong

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Factoring Polynomials of a Higher Degree

Generally by exploiting the weaknesses of the problems.

In some cases I expanded the ones I thought might be right. In other cases I plugged in small numbers to determine equality.

Probably not fast enough for tests but I assumed you only wanted me to check.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

otherwiseknownaskyra

Member

Registered: 2014-04-08

Posts: 13

Re: Factoring Polynomials of a Higher Degree

I noticed in 5 and 14 my error was that I did not factor the sum of squares resulting from the original sum of squares.

However, I'm still at a loss on 12.

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Making mistakes is a lot better than not doing anything. -Billie Joe Armstrong

otherwiseknownaskyra

Member

Registered: 2014-04-08

Posts: 13

Re: Factoring Polynomials of a Higher Degree

I will just ask my teacher about 12. Thank you for your time

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Making mistakes is a lot better than not doing anything. -Billie Joe Armstrong