Question

Persamaan garis melalui titik A(-3,4)dan B(2,-5)adalah...

Answer 1

X1 = -3 ; X2 = 2 ; Y1 = 4 ; Y2 = -5

(y-y1)/(y2-y1) = (x-x1) / (x2-x1)
(y - 4) / (-5 - 4) = (x - (-3) ) / (2 - (-3) )
(y - 4) / -9 = (x + 3) / 5
5 (y-4) = -9 (x+3)
5y - 20 = -9x - 27
9x + 5y = -27 + 20
9x + 5y = -7   atau 9x + 5y + 7 = 0