I need help factoring these polynomial expressions

omg i cannot work these out for the life in me my answers are not on the paper i really suck at math so bad..

1) 3x^2-9x ^2 mean to the second power it is an exponent just incase you did not know.



2) x^2 + 7x +12


3) x^2 +12x + 36




4) x^2 - 3x-10





5) 2x^2 -12x+10



6) 6x^2 + x-2




7) 16n^2 -49






8) 2x^2 -72y^2



please help the stupid girl out:(?

1) 3x^2-9x ^2 =-6x^2

2) x^2 + 7x +12 = (x+4)(x+3)

3) x^2 +12x + 36 = (x+6)^2

4) x^2 - 3x - 10 = (x - 5)(x + 2)

5) 2x^2 -12x+10 = 2(x^2 - 6x + 5) = 2(x - 1)(x - 5)

6) 6x^2 + x - 2 = (3x + 2)(2x - 1)

7) 16n^2 - 49 = (4n + 7)(4n - 7)

8) 2x^2 -72y^2 = 2(x^2 - 36y^2) = 2(x + 6y)(x - 6y)

question 1: -6x^2
questions 2-7: ax^2 +bx+c can be factorized as (x-x1)(x-x2) where x1= {-b+(b^2- 4ac)^0.5}/2a and x2= {-b-(b^2- 4ac)^0.5}/2a
question 8: 2(x-6y)(x+6y)