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b) (-5,6)*8,4+(-5,6)*1,6= (-5,6)* (8,4 + 1,6) = (-5,6)* 10= -56
c) 7,2*(-1,2)-(-1,2)*3,1=(7,2 - 3,1)* (-1,2) = 4,1*(-1,2)= -4,92
d) 11*(-2,7)-11*(-4,8)= 11* [(-2,7)- (-4,8)] = 11* 2,1 = 23,1
e) (-3,7)*2,4-3,5*(-3,7)= (-3,7)* (2,4 - 3,5) = (-3,7)* (-1,1) = 4,07
f) (-7,5)*(-3,3)-(-7,5)*8= (-7,5)* (-3,3 - 8) = (-7,5)* (-11,3) = 84,75
b) (-5,6)*8,4+(-5,6)*1,6= -47,04-8,96=-56
c) 7,2*(-1,2)-(-1,2)*3,1=-8,64+3,72=-4,92
d) 11*(-2,7)-11*(-4,8)=-29,7+52,8=23,1
e) (-3,7)*2,4-3,5*(-3,7)=-8,88+12,95=4,07
f) (-7,5)*(-3,3)-(-7,5)*8=24,75+60=84,75