2) it will start off as (2x )(2x ) You will have to figure out the factors of 9 that when I multiply each by 2x they will add or subtract to be 12x need sign in front

3) Take out a 10

10(x^sqrd-9) break that up, factors of 9 have to add or subtract to be 0

4) Take out a 5x(x^2-7x-30) break up whats in the ()