+0  
 
0
187
2
avatar+164 

4x(x + 2) - 2x (3 - x)

 

Apparently the answer is 6x squared + 2x  but how?  I just can't get it to come to this.

 

Please help.

Walthamx  Oct 28, 2017
 #1
avatar
0

Simplify the following:
4 x (x + 2) - 2 x (3 - x)

 

Factor 2 out of 4 x (x + 2) - 2 (3 - x) x giving 2 (2 x (x + 2) - (3 - x) x):
2 (2 x (x + 2) - (3 - x) x)

2 x (x + 2) = 2 x^2 + 4 x:
2 (2 x^2 + 4 x - (3 - x) x)

-x (3 - x) = x^2 - 3 x:
2 (x^2 - 3 x + 2 x^2 + 4 x)

 

Grouping like terms, 4 x + 2 x^2 - 3 x + x^2 = (2 x^2 + x^2) + (4 x - 3 x):
2 ((2 x^2 + x^2) + (4 x - 3 x))

2 x^2 + x^2 = 3 x^2:
2 (3 x^2 + (4 x - 3 x))

4 x - 3 x = x:
2 (3 x^2 + x) = 6x^2  +  2x


 

Guest Oct 28, 2017
 #2
avatar
+1

4x(x + 2) - 2x (3 - x)

 

4x^2 + 8x - 6x + 2x^2

(4x^2 + 2x^2) + (8x - 6x)

6x^2  +  2x

Guest Oct 28, 2017

6 Online Users

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.