I have tried my best to solve these, working answers that are posted would be appreciated!! I want to see where im going wrong, if you could post your work it would be awesome.

1) -1/25d(d-40)

- What are the d intercepts?

- Find the vertex

- Write the function in standard form

2) h= -3/144(d-96)(d+96)

- What are the d intercepts?

- Find the vertex

- Write the function in standard form

3) y= 1/10x^2-2x

- What are the x intercepts