Asked by Angie
                If x=4 and y=-2, the value of 1/2xy^2 is..?
i think it's 8.
            
        i think it's 8.
Answers
                    Answered by
            Chopsticks
            
    1/2*4*(-2^2)= -8
I got -8
    
I got -8
                    Answered by
            Brianna
            
    its a positive eight 
because -2 to the power of two gives you a postive four
then, when you multiply across you get
(1/2)(4)(4) which equals eight
    
because -2 to the power of two gives you a postive four
then, when you multiply across you get
(1/2)(4)(4) which equals eight
                    Answered by
            Angie
            
    When you substitute y for -2, what do you get?
    
                    Answered by
            Chopsticks
            
    hmm..
-2^2 = -2 * 2
am I right?
    
-2^2 = -2 * 2
am I right?
                    Answered by
            Angie
            
    or is it (-2^2), because the exponent is part the base..
    
                    Answered by
            Chopsticks
            
    It's the same thing. It comes out to be -4
    
                    Answered by
            Angie
            
    What does (-2)^2 equal to?
    
                    Answered by
            Chopsticks
            
    if its put like that, then its 4
    
                    Answered by
            Angie
            
    then is the answer 8, because it's 1/2(4)(-2)^2?
    
                    Answered by
            Brianna
            
    its a POSTIVE 8
-2 squared is a positive 4
    
-2 squared is a positive 4
                    Answered by
            Brianna
            
    if theres parentheses around this part
(-2)^2
its four
if its just like this
-2^2
then its negative four because you square it first and then smack on the negative
    
(-2)^2
its four
if its just like this
-2^2
then its negative four because you square it first and then smack on the negative
                    Answered by
            Angie
            
    thank you
    
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