Teacher2Teacher

Q&A #104

Teachers' Lounge Discussion: Factoring trinomials

T2T || FAQ || Ask T2T || Teachers' Lounge || Browse || Search || T2T Associates || About T2T

View entire discussion
[<< prev] [ next >>]

From: Paul DeSantis

To: Teacher2Teacher Public Discussion
Date: 2009012210:43:27
Subject: Re: Re: trinomials

Factoring 35x^2 - 88x + 45: ac =(35)(45)=1575. Factors of 1575 that add to -88 are -63 and -25. Rewrite trinomial as 35x^2 - 63x - 25x + 45. Group as (35x^2 - 63x) - (25x - 45). Factor GCF from each group 7x(5x - 9) - 5(5x - 9). Factor GCF again (5x - 9)(7x - 5).

Post a reply to this message
Post a related public discussion message
Ask Teacher2Teacher a new question


[Privacy Policy] [Terms of Use]

_____________________________________
Math Forum Home || The Math Library || Quick Reference || Math Forum Search
_____________________________________

Teacher2Teacher - T2T ®
© 1994- The Math Forum at NCTM. All rights reserved.
http://mathforum.org/