its step 2 he did not subtract it right hope this helps and have a great day and get some sleep lol
The answer would be B. Look at the graph - on top, to the left goes toward -infinity, while to the right it does the opposite. On the bottom, or the y, to the left and right it increases indefinitely. Plug this together, and you have your answer.
I hope this helped, and have a nice day!
No because it would be
if you knew that
ax^2+bx+c was a trinomial square, then the factored form would be

or

so
if w^2-9w+81 is perfect square, factored form is either

or

aka

or
expand them
(x+9)^2=x^2+18x+81, wron middle term
(x-9)^2=x^2-18x+81 wrong
so it is not
Oh, I remember this one. Here's this if you need it, if it doesn't help then let me know.