Question

Evaluate -s^4 when s= -3

Answer 1

substiute s=-3 \[\implies -(-3)^4\]
so do you know the value of (-3)^4?

Answer 2

My issue is that I'm not sure if the problem will translate into
-3^4
or
3^4

Answer 3

it translates to -3^4

Answer 4

because the negative sign is outside of the parenthesis..make sense?

Answer 5

Even if the original problem does not contain parenthesis?

Answer 6

hmm...in the original problem what you're raising to 4 is s right?

and it is given that s = -3

so you're going to raise -3 to the 4th power which translates to (-3)^4 because -3 is the WHOLE s...that's why you put a parenthesis.

then there's a negative sign outside

-(-3)^4

right?

Answer 7

Well when I'm substituting -s with -3, it seems to me that those two negative signs would cancel each other out?

Answer 8

Sorry it took me so long to respond- for some reason it wouldn't allow me to post!

Answer 9

noooo

Answer 10

remember PEMDAS

Answer 11

you raise s = -3 to 4 first THEN multiply to -1

Answer 12

would you like to see an example?

Answer 13

Yes please!

Answer 14

\[\huge -x^2y^3\]
given that x= -4 and y = 2

so if you substitute..
\[\huge \implies -(-4)^2 (2)^3\]
remember that:
\[\huge (-4)^2 \implies -4 \times -4 \implies 16\]
and
\[\huge (2)^3 \implies 2\times 2 \times 2 \implies 8\]

so...
\[\huge -(-4)^2 (2)^3 \implies -(16)(8) \implies -128\]

Answer 15

did that help?

Answer 16

YES!!!! OK I see it now!!! Thank you!

Answer 17

welcome

Answer 18

So it would be -(-3)^4 which would be -(81) and my final answer would be -81

Answer 19

right!!!

Answer 20

Awesome! Thanks again!

Answer 21

welcome