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a₁*a₂=-1
2*a₂=-1
2a₂=-1/:2
a²=-½
y=a₂x+b
3=-½*0+b
3=0+b
-b=0-3
-b=-3/:(-1)
b=3
równanie w postaci kierunkowej to:
y=-½x+3
równanie w postaci ogólnej to:
½x+y-3=0