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3x+2y+C=0
3 * (-2)+ 2 * (4) +C=0
-6+8+C=0
2+C=0
C=-2
3x+2y-2=0
-3y=-2x-6
y=2/3x+2
szukana prosta y=ax+b
a=-3/2 z wrunku prostopadłości
y=-3/2x+b
A=(-2,4)-punkt przez który przechodzi ta prosta
4=-3/2*(-2)+b
4=3+b
b=1
y=-3/2x+1
-3y=-2x-6
y=2/3x+2
prosta prostopadla a1*a2=-1
2/3*a2=-1
a2=-1/ 2/3
a2=-3/2
y=-3/2x+b
4=-3/2*(-2)+b
b=4-3
b=1
y=-3/2x+1