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-2×[3-(-6):(-9)]-2×[5-(-7)] = ?

Răspuns :

-2×[3-(-6):(-9)]-2×[5-(-7)]=

=-2×[3+6:(-9)]-2×(5+7)=

[tex] = - 2(3 - \frac{6}{9} ) - 2 \times 12 = [/tex]

[tex] = - 2 \times \frac{7}{3} - 24 = [/tex]

[tex] = \frac{14}{3} - 24 = [/tex]

[tex] = - \frac{86 }{3} [/tex]