7 - [3 - (4 +4) +2]
Hi
7-[3-(4+4)+2]
7-(3-8+2)
7-(-3)
7+3
= 10
I hope that's help and if you have questions please ask me :)
x^2 - 9 = (x + 3)(x -3)
3x - 9 = 3(x - 3)
and
6
Common denominator would be 6(x+3)(x - 3)
Answer: 6(x+3)(x - 3)