
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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April 7th, 2010, 05:36 AM  #1 
Senior Member Joined: Apr 2010 Posts: 128 Thanks: 0  I need help in factorising power of quad and 3 unknown
I find myself two question unable to solve through my text books , it all involves factorization. It's a challenge from my mathematics teacher to my class.(in my middle and high school text book , there are no solutions for power quad nor 3 unknown) 1) Factorize . (x^2 + x)^2  8(x^2 + x) + 12 2) Factorize . abc  a^2b + ab^2  a + b  c 
April 7th, 2010, 12:22 PM  #2  
Math Team Joined: Dec 2006 From: Lexington, MA Posts: 3,267 Thanks: 406  Re: I need help in factorising power of quad and 3 unknown Hello, rnck! Quote: ^2\,+\,x" />  
April 8th, 2010, 12:42 AM  #3 
Senior Member Joined: Apr 2010 Posts: 128 Thanks: 0  Re: I need help in factorising power of quad and 3 unknown
Thanks soroban....(I have forgotten substitution that my past year teacher thought) *It looks like....i've been tricked.....by my mathematics teacher....(i went as far as pascal triangle but resolve nothing) 
April 8th, 2010, 12:54 AM  #4  
Senior Member Joined: Apr 2010 Posts: 128 Thanks: 0  Re: I need help in factorising power of quad and 3 unknown Quote:
Here's the answer for the quote above (ab1) (abc) What missing is working step which i failed to even form one.....any formula / steps recommendation?  
April 8th, 2010, 04:20 AM  #5  
Member Joined: Feb 2010 Posts: 51 Thanks: 0  Re: I need help in factorising power of quad and 3 unknown Quote:
When you expand the answer, it would be  
April 8th, 2010, 05:56 AM  #6  
Senior Member Joined: Apr 2010 Posts: 128 Thanks: 0  Re: I need help in factorising power of quad and 3 unknown Quote:
oh yea , thanks for pointing it out , i mistyped the question. but still it is... (to be honest , the main reason i submit this question is because i can't get +abc after expanding it , weird) maybe he gave wrong answer or wrong question to me. assume if it is his mistake is there anyhow to deexpand it? (based on your equation after expanding the answer?)  
April 8th, 2010, 06:33 AM  #7 
Member Joined: Feb 2010 Posts: 51 Thanks: 0  Re: I need help in factorising power of quad and 3 unknown
When the question is like this, Take ab out for the first three terms and 1 for the rest, Then, you can get Hope that I got it correct... But if your question is this one It would be And then, it becomes 
April 8th, 2010, 06:48 AM  #8 
Senior Member Joined: Apr 2010 Posts: 128 Thanks: 0  Re: I need help in factorising power of quad and 3 unknown
I see , so the main point is to factor the multiplied terms into single terms equivalent to nonmultiplied term and solve... ok , thanks. (Hopefully these two question will guide me through my maths exam) 
April 8th, 2010, 06:53 AM  #9  
Member Joined: Feb 2010 Posts: 51 Thanks: 0  Re: I need help in factorising power of quad and 3 unknown Quote:
Experience will definitely help you a lot. Good luck!  

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