Algebra 1HardFactoring ShareFactoring · Hard problemFactor: x2+21x+108x^2 + 21x + 108x2+21x+108.A(x−9)(x−12)(x - 9)(x - 12)(x−9)(x−12)B(x+9)(x+12)(x + 9)(x + 12)(x+9)(x+12)C(x+21)(x+1)(x + 21)(x + 1)(x+21)(x+1)D(x+9)(x−12)(x + 9)(x - 12)(x+9)(x−12)Check Show answer Walk through it step by step Practice more like this Review this concept