Simplify 418a−232a+50a4\sqrt{18a} - 2\sqrt{32a} + \sqrt{50a}418a−232a+50a (assume a≥0a \geq 0a≥0)
32a3\sqrt{2a}32a
−2a-\sqrt{2a}−2a
92a9\sqrt{2a}92a
2a\sqrt{2a}2a