Discover Questions

I can t figure out how to show the steps in between to get to the factor of:
6x^3+17x^2+33x+28 Should come out to (3x+4)(2x^2+3x+7)? How many moles of helium are in a balloon at 755 mmhg if it has a volume of 18 l at 25c? Mio papĂ ha un tumore? If we where able to colonize 10 galaxys per 10,000 years how many galaxys would we colonize in 5 billion years? How many meters in kilometer?