M1 Kinematics

What do I do when two particles pass through a point 1 second from each other? It is question 16 (Exercise 2B) from the Edexcel M1 book (the orange one)
Thank you!

Need the question

Thanks- I've thought of t+ or - 1

Two particles P and Q are moving along the straight horizontal line with constant accelertion 2ms^-2 and 3.6ms^-2 respectively. At time t=0, P passes through a point A with speed 4ms^-1. One second later Q passes through A with speed 3ms^-1, moving in the same direction as P.

A) Write down expressions for the displacements of P and Q from A, in terms of t, where t seconds is the time after P has passes through A.
b) Find the value of t where the particles meet.
c) Find the distance of A from the point here the particles meet.
Thanks- I've thought of t+ or - 1