Question

EX 1:

a) -3 x [1-3 x (-3+2 x 5)]=
b)-5 x [-1+2 x (-7+3 x 5) +6]=
c) -1 x [-8 x (-3+2 x 4 ) +6] -11=

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Answer 1

a)-3×[1-3×(-3+2×5)]=
=-3×[1-3×(-3+10)]=
=-3×(1-3×7)=
=-3×(1-21)=
=-3×-20=
=60.
b)-5×[-1+2×(-7+3×5)+6]=
=-5×[-1+2×(-7+15)+6]=
=-5×(-1+2×8+6)=
=-5×(-1+16+6)=
=-5×(15+6)=
=-5×21=
=-105.
c)-1×[-8×(-3+2×4)+6]-11=
=-1×[-8×(-3+8)+6]-11=
=-1×(-8×5+6)-11=
=-1×(-40+6)-11=
=-1×-34-11=
=34-11=
=23.