SOLUTION: I have a question for example 1/2xy^2 when x is 4 and y is -2 do you have to put the expression like 1/2*4*-2^2 Or 1/2*4*(-2)^2 with the parentheses? I always gets confuse

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Question 990597: I have a question for example
1/2xy^2 when x is 4 and y is -2 do you have to put the expression like
1/2*4*-2^2
Or
1/2*4*(-2)^2 with the parentheses? I always gets confuse
Found 2 solutions by Timnewman, MathTherapy:
Answer by Timnewman(323)   (Show Source): You can put this solution on YOUR website!
Yes!
your second assumption is the correct one:
Always seperate the signs with parenthasis so as to atract a better mark.
DO NOT GET CONFUSED IN THIS REGARDS AGAIN!!!
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

I have a question for example
1/2xy^2 when x is 4 and y is -2 do you have to put the expression like
1/2*4*-2^2
Or
1/2*4*(-2)^2 with the parentheses? I always gets confuse
 is correct since you have to SQUARE the value of y, which is - 2. 



First expression:  ------>  ------> .

Second expression:  ------->  --------> .

Do you see the difference? 

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