Resposta :
Resposta:
x = ( – 10 ) . [( + 9 ) . ( – 2 )] = -10 *(-18) = 180
y = [( – 10 ) . ( + 9 )] . ( – 2 ) = -90*(-2) = 180
logo x=y
Resposta:
x = ( – 10 ) . [( + 9 ) . ( – 2 )] = -10 *(-18) = 180
y = [( – 10 ) . ( + 9 )] . ( – 2 ) = -90*(-2) = 180
logo x=y