Algebra 1SuperchallengeWhere the Formulas Come From ShareWhere the Formulas Come From · Superchallenge problemSolve −3x2+12x−5=0-3x^2+12x-5=0−3x2+12x−5=0 by completing the square. Simplify all radicals.A6±213\dfrac{6\pm\sqrt{21}}{3}36±21B36±21\dfrac{3}{6\pm\sqrt{21}}6±213C12±213\dfrac{12\pm\sqrt{21}}{3}312±21D6±214\dfrac{6\pm\sqrt{21}}{4}46±21Check Show answer Walk through it step by step Practice more like this Review this concept