Question

Resuelve el siguiente ejercicio:
• (12 - 5 + (3)(-9)) [(2) (-15 +5 + 7)-(6 +4 )( -3+15)] =

Answer 1

=(12+−5+(3)(−9))(2(−15+5+7)+−120)

=(12)(2(−15+5+7))+(12)(−120)+(−5)(2(−15+5+7))+(−5)(−120)+((3)(−9))(2(−15+5+7))+((3)(−9))(−120)

=−72−1440+30+600+162+3240

=2520