Question

(+2)×(-6)+(-5)×(-3)
$( + 2) \times ( - 6) + ( - 5) \times ( - 3)$

Answer 1

Regra de sinais:
+ com (-) = (-)
(-) com (-) = +

2.(-6) = +.(-) = - 12
(-5).(-3) = (-).(-) = (+)15

logo: 15- 12 = 3

= (+ 2) × (- 6) + (- 5) × (- 3)
= - 12 + 15
= 15 - 12
= 3