Question

simplify : (3x)^2*x^-1
a)3x
b)9/x^2
c)9x
d)3/x^2

Answer 1

so any ideas on how to begin?

Answer 2

3^2=9 i think it is C 9x

Answer 3

3^2=9 is correct, how would you simplify the other parts though?

Answer 4

what do you do to the exponents when you multiply like bases?

Answer 5

subtract

Answer 6

add

Answer 7

well yes in this case you would, but that is just adding a negative here

Answer 8

so it would just b x *9x=9x

Answer 9

well you have \(9x^2*x^{-1}\)

Answer 10

what you typed that equaled 9x anctually equals \(9x^2\)

Answer 11

9/x^2

Answer 12

how did you get that?

Answer 13

9x^2*x^-1 2-1=1 9x*x=9x

Answer 14

that would be correct, with correct reasoning.

Answer 15

ok thank u

Answer 16

but you do not write 9*x*x, that is 9x^2, there is not inbetween step

Answer 17

so b is the answer

Answer 18

?

Answer 19

yes, but you are writing 9x^2=9x above, you shouldn't do that. It only works for x=1 then

Answer 20

or c

Answer 21

9x*x=9x^2

Answer 22

it's 9x like you said

Answer 23

ok

Answer 24

simplify: r^2s^4t/r^2st^3
a)s^3/t^2
b)s^3/t
c)s^2/t^3
d)s/t