Question

Can someone guide me through inequality questions?
i) 15-2y-y^2<0
ii) 20x-4x^2-25>0

Answer 1

\[y^2+2y-15>0\]

Answer 2

so now, (y-3)(y+5)>0? and y>-5 or y<3?

Answer 3

The first part is right. If you multiply two factors and get a positive result, then both factors must be positive or both factors must be negative.