Răspuns:
a) (-2)³+5[(-1)^2020(-1+1)+2(-2+2•3)]=
(-2)³+5[1^2020•0+2(-2+6)]=
(-2)³+5[2•(+4)]=
(-2)³+5•8=
-2³+5•2³=2³(5-1)=2³•4=8•4=32
b) (-2)²-10[-3-3(-3-2)]=
2²-10(-3-3•-5)=
2²-10(-3-15)=
2²-10•-15=
4+150=154
c)5³{14[(-1)^34(-1+1)-5(5-2)]}:2³=
5³(14•0-5•3):2³=
5³•-15:2³=
5³•-5•-3:2³=
5²•-3:2³=25-3•8=25-24=1
Sper că te-am ajutat!
