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melalui (4,-3)
tegak lurus =m1xm2= -1( gradien 1 x gradien 2 ) = -1
gradien garis g (1) = -a/b = -3/2
m1 x m2 = -1
-3/2 x m2 = -1
m2 = -1/(-3/2)
m2 = -1 x 2/-3
m2 = 2/3
karena melaui titik (4,-3) maka x1= -3 , y1=4
persamaan garis = y-y1 = m(x-x1)
= y-(-3) = 2/3(x-4)
= y+3 = 2x/3-8/3
= y+3 = 2x/3-8/3 ( sama-sama dikali 3)
= 3y+9 = 2x-8
= 3y= 2x-8-9
= 3y= 2x-17
= -3y+2x-17 = 0 (sama-sama dikali -1)
= 3y-2x+17=0 (A)