thanks so much prove it, but can you explain when you get the (x-7) squared, how do you elimate the second (x-7) in the last step? does it cancel itself out? dont understand that step, thanks again
thanks so much prove it, but can you explain when you get the (x-7) squared, how do you elimate the second (x-7) in the last step? does it cancel itself out? dont understand that step, thanks again
To undo a square, you need to square root both sides. The square root of 0 is 0.