Three forces act on an object F1=−5i+7j\mathbf{F}_1 = -5\mathbf{i} + 7\mathbf{j}F1=−5i+7j, F2=4i+6j\mathbf{F}_2 = 4\mathbf{i} + 6\mathbf{j}F2=4i+6j and F3=3i−5j\mathbf{F}_3 = 3\mathbf{i} - 5\mathbf{j}F3=3i−5j
Find the resultant force.