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Allan is deriving the quadratic formula, as pictured below. His work is incorrect. In which step did Allan first make an error? Step 3, 4, 5 or 6?
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12 votes
Allan is deriving the quadratic formula, as pictured below. His work is incorrect. In which step did Allan first make an error? Step 3, 4, 5 or 6?

Allan is deriving the quadratic formula, as pictured below. His work is incorrect-example-1
User Specto
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1 Answer

11 votes

Answer:

step 5 is the answer

User AmirtharajCVijay
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