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se dau punctele A (1;1) ; B (2;3); C(-1;-2) aflati ecuatie dreptei (AB)

Răspuns :

GreenEyes71

Salut,

Ecuaţia dreptei este:

[tex]\dfrac{x-x_A}{x_B-x_A}=\dfrac{y-y_A}{y_B-y_A},\;adic\breve{a}:\;\dfrac{x-1}{2-1}=\dfrac{y-1}{3-1},\\\\sau\;2x-2=y-1\Rightarrow 2x-y-1=0[/tex]

Green eyes.