Answer to Question #142374 in Analytic Geometry for me

Question #142374
the coordinates of point P and Q are (-2,3) and (1,2) respectively .A straight line QR is perpendicular ti the straight line PQ.find the equation of the straight line QR
1
Expert's answer
2020-11-04T16:38:36-0500

a(xx0)+b(yy0)=0 where n normal line vectora(x-x_0)+b(y-y_0)=0\text{ where } \vec n\text{ normal line vector}

(x0,y0)=Q(1,2)(x_0,y_0)=Q(1,2)

n=PQ=(1(2),23)=(3,1)\vec n=\vec {PQ}=(1-(-2),2-3)=(3,-1)

3(x1)1(y2)=03(x-1)-1*(y-2)=0

3xy1=03x-y-1=0

Answer: 3xy1=03x-y-1=0


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