+0  
 
0
37
2
avatar+42 

What is the expression in factored form?

 

9x^2 – 4 

Littlegirlblue  Nov 30, 2018
 #1
avatar+92814 
+2

9x^2  - 4

 

We have a difference of squares.....so......

 

a^2 - b^2 =  (a + b) (a - b)

 

Let   a^2  = 9x^2   so....a = 3x

Let b^2 = 4  so......b = 2

 

So we have

 

9x^2 - 4  =   (3x + 2) (3x - 2)

 

 

cool cool cool

CPhill  Nov 30, 2018
 #2
avatar+456 
+3

We see a difference of squares! \(\sqrt9=3, \sqrt4=2\) so...

\((3x+2)(3x-2)\).

 

You are very welcome!

:P

CoolStuffYT  Nov 30, 2018

15 Online Users

avatar
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.