Please help me with this

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

Is a positive integer raised to a negative power always positive

The diagram represents the polynomial 4x2 + 23x – 72. what is the factored form of 4x2 + 23x – 72? (4x + 8)(x – 9) (4x – 8)(x + 9) (4x + 9)(x – 8) (4x – 9)(x + 8)