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10laputerea3×85-10la puterea 3×61-3000

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Byancageorgiana
10 la puterea 3 × 85-10 la puterea 3 × 61-3000=21000
10 la puterea 3 = 1000
1000×85-1000×61-3000=21000
   
[tex]10^3\times85-10^3\times61-3000 = \\ \\ 10^3\times85-10^3\times61-3 \times 1000 = \\ \\ = 10^3\times85-10^3\times61-3 \times 10^3 = \\ \\ =10^3(85-61-3)= 10^3(24-3)= 10^3 \times 21= 1000 \times 21 = \boxed{21000} [/tex]



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