Salut!
[tex] \bf a)+ 6 \times ( - 24) = 6 \times - 24 = - 144.[/tex]
[tex] \bf b)(- 5) \times ( - 18) = - 5 \times - 18 = + 90.[/tex]
[tex] \bf \red {Regula \: semnelor:} [/tex]
[tex] \bf {( + ) \times ( + ) = +; } [/tex]
[tex] \bf ( - ) \times ( - ) = + ;[/tex]
[tex] \bf ( + ) \times ( - ) = - ;[/tex]
[tex] \bf ( - ) \times ( + ) = - .[/tex]
