Subtracting -5y2 from y2 , the result is?

D)6y^2 because y^2 is the one thing both terms have in common.
I'm guessing the way it looks is. y^2 - (-5y^2)
which really is 1- -5 making both - a + so it is 1+5 =6
y^2 is the common thing so
6y^2
btw y^2 means the 2 is the exponent of the y