Asked by Angie

If x=4 and y=-2, the value of 1/2xy^2 is..?

i think it's 8.

Answers

Answered by Chopsticks
1/2*4*(-2^2)= -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
Answered by Angie
When you substitute y for -2, what do you get?
Answered by Chopsticks
hmm..

-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
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
Answered by Angie
thank you