Question

 Se A = (-5).(+3) e B = (+2).(-6), qual o valor de A . B? 

+100

+360

-120

+180

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Answer 1

Resposta:

OLÁ

$a \times b \\ para \: a = ( - 5) \times ( + 3) \\ b = ( + 2) \times ( - 6) \\ substitui \\ a \times b \\ ( - 5) \times ( + 3) \times ( + 2) \times ( - 6) \\ (- 15 )\times ( + 2) \times ( - 6) \\ ( - 15) \times ( - 12) \\ 15 \times 12 \\ \boxed{ \blue{ = 180}}$

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espero ter ajudado

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