Use the quadratic formula to solve , giving answers to 2 decimal places.

Answer and explanation

Correct answer: C. or

  1. Step 1: : .
  2. Step 2: with .
  3. Step 3: or .
Answer
or .
Why not the others: or : the denominator should be , not 2. or : the sign of was lost. or : the whole expression was not divided by .

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