Question

Can someone explain how to solve this please?
The inequality x^2-14x>15 is equivalent to:

Answer 1

it is equivalent to:

x^2 - 14x - 15 > 0
(x - 15)(x + 1) > 0

Answer 2

so x is greater than 15 and -1, which really just means x is greater than -1?

Answer 3

x < -1 and greater than 15

Answer 4

why is x< -1?

Answer 5

you have to plug in manually in the equation (x - 15)(x + 1) > 0

you can see that if x is between -1 and 15, it is not > 0