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anonymous
 4 years ago
How do I solve by completing the square. Express the solutions in simplest radical form: 1/2x^2 + x  13 = 0?
anonymous
 4 years ago
How do I solve by completing the square. Express the solutions in simplest radical form: 1/2x^2 + x  13 = 0?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Easy to rewrite it as: x^2 + 2x  26 = 0 Then, completing a square will give you: x^2 + 2x + 1  27 = 0 (x+1)^2 = 27

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0The answer is supposed to be \[1 +/ 3\sqrt{3} \]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0'cause I got x = 1 +/ √105 / 4

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Well, when (x+1)^2 = 27, you do get: x + 1 = +/ SQRT(27) x + 1 = +/ 3*SQRT(3) x = 1 + 3 * SQRT(3) OR x = 1  3 * SQRT(3)

radar
 4 years ago
Best ResponseYou've already chosen the best response.1\[(x+1)^{2}=27\]\[(x+1) =\sqrt{27}\]\[x = 1 \pm \sqrt{27}\]\[x = 1\pm \sqrt{9}\sqrt{3}\]\[x=1\pm3\sqrt{3}\]Do you see how GT answers is the same as your book's answer?
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