Answer
quadratic
x+1
$W^{2}-5W+6=0$
Work Step by Step
$(x+1)^2-5(x+1)+6=0$
Remember
Linear takes form of $ax+b=0$
quadratic takes form of $ax^{2}+bx+c=0$
so this is quadratic type
Set W=(x+1) [substitute (x+1) with W]
$W^2-5W+6=0$