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messy
 Post subject: i want to learn factoring polynomial equation  |  Posted: Thu Apr 20, 2017 4:01 pm

Joined: Thu Sep 29, 2016 6:16 pm
Posts: 13

 can somebody explain this step in detail ?
gbalkam
 Post subject: Re: i want to learn factoring polynomial equation  |  Posted: Fri Jul 14, 2017 7:50 pm

Joined: Sun Sep 25, 2016 8:19 pm
Posts: 32

 (2x+3)(3x+5) is actually the same as (2x+3) multiplied by (3x+5) = (6x +15)Remember in this case (2x+3) is not an equation, it is a value (solution to an equation) since you cant multiply apples time oranges, you would state Apple Apple (2x)+5 orangeswhen you consider it in this manner it becomes easy...3apples x 2 apples = 6 apples+(5 times 3 oranges) (15 oranges) so...(6x+15)Hopefully I remembered that correctly. I haven't used that in about 40 years. LOL
Olinguito
 Post subject:   |  Posted: Mon Jul 17, 2017 9:26 pm

Joined: Mon Aug 19, 2013 3:56 pm
Posts: 157

 gbalkam wrote:(2x+3)(3x+5) is actually the same as (2x+3) multiplied by (3x+5) = (6x +15)That is wrong. It should be:$\displaystyle \begin{array}{rcl}(2x+3)(3x+5) &=& (2x)(3x+5)+3(3x+5) \\ {} &=& 6x^2+10x+9x+15 \\ {} &=& 6x^2+19x+15\end{array}$gbalkam wrote:Remember in this case (2x+3) is not an equation, it is a value (solution to an equation)It's neither an equation nor a solution. What it is is an expression involving the unknown x.gbalkam wrote:Hopefully I remembered that correctly.Nope. _________________Blog
iNow
 Post subject: Re: i want to learn factoring polynomial equation  |  Posted: Mon Jul 17, 2017 10:08 pm

Original Member

Joined: Thu Aug 04, 2011 11:40 pm
Posts: 5725
Location: Iowa

 Appreciate your correction, Olinguito, and also thanks to gbalkam for trying to help the OP which hadn't received a response despite being posted months ago _________________iNow"[Time] is one of those concepts that is profoundly resistant to a simple definition." ~C. Sagan
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