Can someone please explain to me how to solve this problem.
Complete the square x^2-8x
I keep looking over the explanation in my book and i just doesn't make sense to me.
You should know that . Comparing that to you can see that "2ax" must be "8x" so that 2a= 8, a= 4. And then . To make into the "perfect square" we need to add 16- and, of course, in order not to change the value we must also subtract 16: .