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Fie A(3;2)si B(2;-1)determinati acuatia dreptei


Răspuns :

(x-3)/(3-2)=(y-2)/(2-(-1))
x-3/1=(y-2)/(2+1)
x-3=(y-2)/3
y-2=3(x-3)
y-2=3x-9
y=3x-9+2
y=3x-7