If x=4 and y=-2, the value of 1/2xy^2 is..?
i think it's 8.
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
1/2*4*(-2^2)= -8
I got -8
When you substitute y for -2, what do you get?
hmm..
-2^2 = -2 * 2
am I right?
or is it (-2^2), because the exponent is part the base..
It's the same thing. It comes out to be -4
What does (-2)^2 equal to?
if its put like that, then its 4
then is the answer 8, because it's 1/2(4)(-2)^2?
its a POSTIVE 8
-2 squared is a positive 4