exam Maths Puzzle Numerical Ability

when 35z^2-23z-72 is factored completely, one of the factors is:

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exam Other Question

if T=a+(n-1)d find t when a=16 n=11 and d=6
find t when a=20 n=6 and d=-2

please help me im stuck!!! Please put in correct sequence starting from larger number ending in the smaller number:
I said it was in this order:Is this correct:
1) 0.401
2) 0.4013
3) 0.4030
4) 0.4031
5) 0.40101
6) 0.40303