Question

calculați: a) -3×[1-3×(-3+2×5)]; b) -5×[-1+2×(-7+3×5)+6]; c) -1×[-8×(-3+2×4)+6]-11 d) -2×[-5-1×(-3+2×1]-7×(-1)
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Answer 1

Răspuns:

a) -3x[1-3x(-3+10)]

-3x(1-3x7)

-3x(1-21)

-3x(-20)

60

b) -5x[-1+2x(-7+15)+6]

-5x(-1+2x8+6)

-5x(-1+16+6)

-5x21

-105

c) -1x[-8x(-3+8)+6]-11

-1x(-8x5+6)-11

-1x(-40+6)-11

-1x(-34)-11

34-11

23

d) -2x[-5-1x(-3+2)]-7x(-1)

-2x[-5-1x(-1)]+7

-2x(-5+1)+7

-2x(-4)+7

8+7

15