Homework Help: Math

Posted by anonymous on Sunday, August 22, 2010 at 1:04pm.

Simplify:
a) 8^2 = 64 ... correct?
b) 8^-2 = 1/8^2 ... correct?
c) (1/8)^2 = 1/64??
d) (1/8)^-2 = 1/64??
e) -8^2 = 64??
f) (-8)^2 64??

Please let me know if these are correct.
Thank you!

Math - Joejoe, Sunday, August 22, 2010 at 1:07pm
yes they are all correct, i tried them on my calculator.
Math - anonymous, Sunday, August 22, 2010 at 1:11pm
Thank you!!
Math - Reiny, Sunday, August 22, 2010 at 1:12pm
d) is not correct
(1/8)^-2
= (8/1)^+2
= 64

be careful with e) and f)

e) -8^2 = -64
it means -(8)(8)

f) (-8)^2 = +64
it means (-8)(-8)
Math - Joejoe, Sunday, August 22, 2010 at 1:14pm
i guess i made the same mistake she did?
Math - anonymous, Sunday, August 22, 2010 at 1:14pm
Thank you!!

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