How to factor completely* 2x^2-16^2?
The answer is 2(x+9)(x-9) but I don't get how to solve it PLEASE HELP

Question

anonymous · Answer

I'm so stumped I'm starting to think that my book had an error in it...

anonymous · Answer

what to solve its not a equation ....we solve equation to get value for variable. that means solve..

here legallly it not a equation at all.

campbell_st · Answer

I think the 2nd term should be 162 

not 16^2

as 9^2 = 81  

the 2 * 81 = 162

campbell_st · Answer

so the question would be factor

2x^2 - 162

which would be

2( x - 9)(x + 9)

anonymous · Answer

Okay, how to factor completely*

anonymous · Answer

I know the answer, I just don't know how to get the answer

campbell_st · Answer

well take 2 as a common factor

2(x^2 - 81) 

now the quadratic is the difference of 2 squares

which can be factored

anonymous · Answer

Oh.. so it was an error.. thanks!

campbell_st · Answer

that would be by best guess to the question...