+0  
 
+1
70
2
avatar+269 

Is there any way to get this answer without actually looking at the given answers? 

LaughingFace  May 7, 2018
 #1
avatar+87323 
+1

2x^2 + 15x  + 25

 

Here's a method that often works for problems like these...it's a little guesswork....but sometimes it pays off

 

I'm guessing that we can   write  15x   in this  manner......  10x  +  5x

 

2x^2 + 10x  + 5x  +  25

 

I see that  the first constant multiplied by 5 will give me the second constant.....and the third constant  multiplied by 5  will give me the last constant...so......let's factor. the first two  terms and the last two  terms....   [factoring  by "grouping " ]

 

2x ( x + 5 )  + 5 ( x + 5).....  note that  ( x + 5)  is common

 

So......the factorization  is

 

( x + 5 )  ( 2x + 5)

 

 

 

cool cool cool

CPhill  May 7, 2018
 #2
avatar+269 
+1

Thanks so much!!!

LaughingFace  May 7, 2018

9 Online Users

avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.