Question

What does the graph of f(x)=(3x-5)(x+9) cross the x axis

Answer 1

Hello.

Firstly, we need to simplify the function:


`image`

The graph crosses the 'x' axis when y = 0. Ergo:


`image`

Therefore, the graph crosses the x axis when x = -9 and 5/3.

Hope I helped.