SOLUTION: I have a follow up question to my problem: 9/2-sqt(7) Are you suppose to multipy 9(2+ sqrt(7)? If so should it be 18+9 sqrt(7)? If I am just leaving the 9 alone why?

Question 879940: I have a follow up question to my problem: 9/2-sqt(7)
Are you suppose to multipy 9(2+ sqrt(7)? If so should it be 18+9 sqrt(7)?
If I am just leaving the 9 alone why?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
The 9 and the 2 are connected with division. Exponentiation gets top precedence; and next is multiplications and divisions. Your example has which could be performed first, but you might want to leave this in radical form of .

Do the next.

Next you would subtract the .

The step you are showing is completely different and has no justification. The would be done FIRST; and then you could subtract . The 9 is NOT connected to .
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