What is the sum of the roots of ?

Answer and explanation

Correct answer: B.

  1. Step 1: For ax^2 + bx + c = 0 the sum of the roots is -b/a.
  2. Step 2: -(9)/3 = -3.
Answer
.
Why not the others: The sum of the roots is -b/a; b/a has the wrong sign and c/a is the product of the roots.

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