Question

-y2-5y=0 sparate he two values with comma

Answer 1

Please, write "the square of y" as y^2 (not as y2).

You will then have -(y^2+5y)=0.

Factoring the expression y^2+5y, we get -(y)(y+5)=0.

Then, y=0 or y+5=0.  Thus, y=0 or y=-5.