Question

CALCULEN EL PRODUCTO APLICANDO LA REGLA {-8}x{+9} {-12}{+3} {+13}.{+5} {-4}x{-7} {+7}.{-8}

Answer 1

❥Holiwi꧂

{-8}x{+9} {-12}{+3} {+13}.{+5} {-4}x{-7} {+7}.{-8}

(−8)(9)−12+3+(13)(5)−(4)(−7)+(7)(−8)

=−72−12+3+(13)(5)−(4)(−7)+(7)(−8)

=−84+3+(13)(5)−(4)(−7)+(7)(−8)

=−81+(13)(5)−(4)(−7)+(7)(−8)

=−81+65−(4)(−7)+(7)(−8)

=−16−(4)(−7)+(7)(−8)

=−16−(−28)+(7)(−8)

=12+(7)(−8)

=12+−56

=−44 → Respuesta.