Hi
HELP NEEDED
solve the following by completing the square
2x sqaured (dont know to insert power of 2) + 4x - 6
i know i have to divide it by 2 so i get
x sqaured + 2x - 3
but i dont knwo how to work it
also once i have got the answer i have to check it how do i you do this
PLEASE I REALLY NEED HELP!!
unless there's an "= 0" in your problem, you cannot just divide by 2 like that, youwould have to factor out a 2 in that case. the thing to note about complete squares is that the constant term is always . so we normally add and subtract this term (so that we effectively add 0 and hence do not change the problem) and then simplify to get the complete sqaure.
i will assume we have
(Note that is a complete square)
can you finish?
EDIT: Pfft! too late!