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[(- [tex] \frac{4}{3} [/tex] ) ^7 : (- [tex] \frac{4}{3} [/tex] ) ^5 + (- [tex] \frac{5}{2} [/tex] ) ^5 : (-[tex] \frac{5}{2} [/tex] ) ³ ] ·[tex] \frac{12}{17} [/tex] = ?

Răspuns :

28/21 : (-25/10): 75/8 . 12/17
28/21 . -10/25 :75/8 . 12/17
-280/525 .8/75 . 12/17
-2240/39375 . 12/17
26880/669375
5376/133875
[(4/3)^2+(-5/2)^2]* 12/17= [16/9 +25/4]* 12/17=17/3

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