Question

(y + 4)(4-y)+(y+5)y > 6y-20

Answer 1

(y + 4)(4-y)+(y+5)y > 6y-20
4y+16-y²-4y+y²+5y>6y-20
16+5y>6y-20
5y-6y>-20-16
-y>-36 |*(-1)
y<36