(-2/3)×(-2/3)×(-2/3)×(-2/3) jangan sampai salah

=> (-2/3) × (-2/3) × (-2/3) × (-2/3)
=> (-2/3)^4
=> -2^4/3^4 ----> Pangkatnya genap jadi (+)
=> 16/81
=> 0,19

=(-2/3).(-2/3).(-2/3).(-2/3)
=(2/3)^4
atau
=(-2×-2×-2×-2)/(3×3×3×3)
=16/81
semoga membantu:)