Algebra 1MediumFactoring ShareFactoring · Medium problemFactor: x2+10x+21x^2 + 10x + 21x2+10x+21.A(x−3)(x−7)(x - 3)(x - 7)(x−3)(x−7)B(x+10)(x+1)(x + 10)(x + 1)(x+10)(x+1)C(x+3)(x+7)(x + 3)(x + 7)(x+3)(x+7)D(x+3)(x−7)(x + 3)(x - 7)(x+3)(x−7)Check Show answer Walk through it step by step Practice more like this Review this concept