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Rezolvati ecuatia:
x la a doua +(x+2) la a doua +(x+4) la doua =4(3x+8)
PLSSS URGENT DAU COROANA PE LOC!!


Răspuns :

x^2+x^2+4x+4+x^2+8x+16=12x+32

3x^2+12x+20=12x+32

3x^2+20=32

3x^2=32-20

3x^2=12 | :3

x^2=4

x=+2,-2

x1=-2

x2=+2

x²+(x+2)²+(x+4)²=4(3x+8)

x²+x²+4+4x+x²+16+8x=12x+32

3x²=12

x²=12/3

x²=4

x=+-√4

x=+-2