Solve .

Answer and explanation

Correct answer: D. or

  1. Step 1: Divide both sides by : .
  2. Step 2: Take the square root; both signs work: or .
Answer
or .
Why not the others: or : This divides by a second time instead of taking its square root. : This stops after dividing by and does not take the square root. or : This takes the square root of without first dividing by .

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