Nevoie ecuatii

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SPECIA!
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28 May 2012, 12:40

Deci am nevoie de cateva exercitii rezolvate rapid daca se poate :d
Stiu ca mai facut intr-a 7-a sau a 8-a dar le-am uitat
--2
4x -20x+25>0;
---2
-7x +3x-1<0;
-------------2
x(x-6) <3(x +x-1);

4x+6-x(2x+3)> (x-2) (4x+5)
-------------- (sau egal)

Multumesc
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SPECIA!
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28 May 2012, 13:23

Ma poate ajuta cineva sau nu ?
mezzzu
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28 May 2012, 14:32

nu prea am inteles nimic , fi putin mai explicit
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-AMSTAFF!
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28 May 2012, 15:00

ce reprezinta "--2" ?
SPECIA!
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28 May 2012, 15:03

-AMSTAFF! wrote:ce reprezinta "--2" ?

-- nu reprezinta nimic 2 e la a 2-a
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reTry
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28 May 2012, 15:09

SPECIA! wrote:Deci am nevoie de cateva exercitii rezolvate rapid daca se poate :d
Stiu ca mai facut intr-a 7-a sau a 8-a dar le-am uitat
--2
4x -20x+25>0;
---2
-7x +3x-1<0;
-------------2
x(x-6) <3(x +x-1);

4x+6-x(2x+3)> (x-2) (4x+5)
-------------- (sau egal)

Multumesc
D = -b / 4ac dupa faci x1,2 = -b +- radical D / 4a .
la ultimele mai intai desfaci parantezele si treci totul intr-un singur membru dupa care o sa-ti apara tot o ecuatie de gradul 2.
axionnneeeel
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