I have a math assignment due tomorrow and there are a few questions that I don't even know where to begin, how to do, etc. Just overall stumpers. A group of 8 people from the class have been involved in an msn convo for the last 2hr trying to figure them out.. with no luck whatsoever. Any help/tips/start offs, etc. would be very much appreciated!

1) (3x-5)(3x+1)² (3x+7) + 68 = 0

Answer:-1± √34,-1± √2

..................... 3 ............. 3 ....

2) (x²+6x+6)(x²+6x+8) = 528

-8, 2, - 3 ±

Answer:i√ 21

3) The height, length, and width of a small box are consecutive integers with the height being the smallest of the three dimensions. If the length and width are increased by 1cm each and the height is doubled, then the volume is increased by 120cm³. Find the dimensions of the original box.

Answer:3cm, 4cm, 5cm