my sister and i have been arguing over the answer to this problem all day, please...

[COol chIkK.]

...somone help prove im right? (-3xy^3)^4

 

[nozar nazari]

=+81x^4y^12

 

[pyz01]

OK

The answer is:

81x^4y^12 ; notice, -3^4 = +81. x^4 is x^4. y^3^4 = y^12

Hope that helps.

 

[Joe]

(-3xy^3)(-3xy^3)(-3xy^3)(-3xy^3)
(9(x^2)(y^6))(9(x^2)(y^6))
81(x^4)(y^12)

 

[Emily R]

81(x^4)(y^12)