exam Maths Puzzle Numerical Ability

How do you factor the following problems step by step?

1. 9-x^2
2. 4x^2+81-36x
3. 4y^2+16y+16
4. x^-25/x+5

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exam Other Question

Graph the inequality y<-3x+2

(side note) if you can give me at least 3 points and explain how you got them I would really appreciate it
Solve and write in interval notation for the solution set
1. /x+2/>_ 4

2. 2x-3 _< -5 or 2x + 1 >_ 2