2x+33 you distribute the 3 to the numbers in the first set of parentheses and you distribute a -1 to the numbers in the second set of parentheses. then you combine like terms, which are 3x and -x, and 27 and 6 this gives you the answer 2x+33
It looks like the dot would be placed on about 12.4 or 12.45. I hope that this helped. And that means that the square root would be located at 153.76 or 155.0025.