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va rog raspunsul la: 5pe8x(-2)+2,5
x adica ori


Răspuns :

5/8=5:8=0.62
0.62x(-2)+2.5=
-1.38+2.5=1.12
[tex]\frac{5}{\not8}\cdot(-\not2)+2,5= \\ \\ = -\frac{5}{4}+ \frac{25}{10}= \\ \\ = -\frac{5}{4}+ \frac{5}{2}= \\ \\ = -\frac{5}{4}+ \frac{10}{4}= \frac{5}{4} [/tex]