exam Maths Puzzle Numerical Ability

how would i do this?
Factor the following polynomial completely.

y2 + 12y + 36=

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exam Other Question

Hi, I have to solve the following for t:

300=500(1-e^0.2t)
Assume that ln *0.4)= -0.9

I wouldnt even know where to start..all i can think to do is
300500=(1-e^0.2t)

any help would be very much appreciated! thanks Could you please use this as an example to solve each system by substitution method and tell if the equations are independent, dependent or inconsistent?
Thank you.

2x-y=4
2x-y=3