-1/2=2a+b
1/3=-3a+b
-1/2 - 1/3 = 2a - (-3a)
(-3-2)/6=5a
-5/6=5a / :5
a=-5/6*1/5=-1/6
b=-1/2 - 2a = -1/2 + 2/6 = -1/6
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A=(2 , -1/2) B=(-3 , 1/3)
2a+b=-1/2 /*(-1)
-3a+b=1/3
-2a-b=1/2
-3a+b=1/3
----------------- +
-5a=5/6
a=5/6 :(-5)
a=-1/6
-1/2=2a+b
1/3=-3a+b
-1/2 - 1/3 = 2a - (-3a)
(-3-2)/6=5a
-5/6=5a / :5
a=-5/6*1/5=-1/6
b=-1/2 - 2a = -1/2 + 2/6 = -1/6