Algebra - 2n^2 + 4n = 0

Question

2n^2 + 4n = 0

What does n equal?

Answer 1

Hi Tahlia,

To solve this equation you will need to simplify the equation by determining the greatest common factor and then solving for n.

 

2n² + 4n = 0 (the greatest common factor among 2n² and 4n is 2n)

=> 2n(n + 2) = 0.

 

Now solve for n:

2n = 0 => n = 0 OR

n + 2 = 0 => n = -2

 

Hope this helps!

Answer 2

2n^2 + 4n = 0 

 

divide through by 2

 

n^2 + 2n  = 0

 

factor out n

 

n(n+2)    = 0

 

n=0 or n+2 =0 

 

Answers:  n = 0 or n = -2