Answer:
2(x^2 + 8x -55)
Explanation:
Well to do the box method we first need to simplify the given equation further to,
,
For this quadratic the box method doesn't work so we can divide everything by 2 make make it
2(x^2 + 8x -55)
Thus,
factored is 2(x^2 + 8x -55).
Hope this helps :)