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

Question

i think it's 8.

Answer 1

1/2*4*(-2^2)= -8

I got -8

Answer 2

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

Answer 3

When you substitute y for -2, what do you get?

Answer 4

hmm..

-2^2 = -2 * 2

am I right?

Answer 5

or is it (-2^2), because the exponent is part the base..

Answer 6

It's the same thing. It comes out to be -4

Answer 7

What does (-2)^2 equal to?

Answer 8

if its put like that, then its 4

Answer 9

then is the answer 8, because it's 1/2(4)(-2)^2?

Answer 10

its a POSTIVE 8

-2 squared is a positive 4

Answer 11

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

Answer 12

thank you