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How do I solve this equation by completing the square. 4X^2 + 12x +5 = 21

How do I solve this equation by completing the square. 4X^2 + 12x +5 = 21
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How do I solve this equation by completing the square. 4X^2 + 12x +5 = 21

User AndrewJE
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The Answer is: x1=-4 x2=1.
User Mfussenegger
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