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3x^2+ 12x+ 81= 15 complete the square
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3x^2+ 12x+ 81= 15 complete the square

User Donovan Thomson
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1 Answer

7 votes

Answer:

x=−2±3i√2

Explanation:

Use the formula ( b/2 )^2 in order to create a new term. Solve for x by using this term to complete the square.

User Gutek
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6.6k points
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