Question Which of these are factors of this polynomial? -3×3 + 15×2 + 3x – 15 0 (x + 1) 3x (3x – 1) (x – 5) -3 (x + 5) (x – 1) 0 0

Answer: -3(x^2 + 1)(x-5) Explanation: -3x^3 + 15x+3x -15 Factor by grouping: -3x^2(x-5) +3(x-5) Combine: (-3x^2 +3)(x-5)Factor by GCF: -3(x^2 +1)(x-5) Set equal to zero: (x^2 +1)=0 (x+5)=0 Solve: x=5, x=square root of 1 Log in to Reply

Answer: -3(x^2 + 1)(x-5)

Explanation: -3x^3 + 15x+3x -15

Factor by grouping: -3x^2(x-5) +3(x-5)

Combine: (-3x^2 +3)(x-5)

Factor by GCF: -3(x^2 +1)(x-5)

Set equal to zero: (x^2 +1)=0

(x+5)=0

Solve: x=5, x=square root of 1