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B (-2,-1)
A - B = (1,1) - (-2,-1)
A - B = (1 - (-2), 1 - (-1))
A - B = (1 + 2, 1 + 1)
A - B = (3, 2)
A = (3,4) - (1,1)
A = (3 - 1, 4- 1)
A = (2, 3)
B = (-4,-5) - (-2,-1)
B = (-4 - (-2) ,-5 - (-1))
B = (-4 + 2 , -5 + 1)
B = (-2,-4)
A + 4B = (2,3) + 4(-2,-4)
A + 4B = (2,3) + (-8, -16)
A + 4B = (2 + (-8) , 3 + (-16))
A + 4B = (2 - 8, 3 - 16)
A + 4B = (-6, -13)
Las coordenadas son
(-6i, -13j)