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Solve the quadratic equation. 2x^2 = 32 A. x = ±4 B. x = 2 and x = 32 C. x = 1 and x = 16 D. x = ±2
2x^2 = 32; x^2 = 32/2; x^2 = 16; x = ±4
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Asked 12/31/2012 10:52:19 AM
Updated 8/31/2014 6:26:33 PM
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Edited by andrewpallarca [8/31/2014 6:26:30 PM], Confirmed by andrewpallarca [8/31/2014 6:26:33 PM]
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Solve for x: (2x - 4)2 = 1 A. 2, 3 B. 3/2, 5/2 C. 3/2, 3/5 D. 3/2, -5/2
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Expert Answered
Updated 8/1/2014 12:40:07 PM
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(2x - 4)^2 = 1;
4x^2 - 16x + 16 = 1;
4x^2 - 16x + 16 - 1 = 0;
4x^2 - 16x + 15 = 0;
(2x - 3)(2x - 5) = 0;
2x - 3 = 0; 2x = 3; x = 3/2;
2x - 5 = 0; 2x = 5; x = 5/2;
Solutions: x = 3/2 or x = 5/2
Added 8/1/2014 12:40:04 PM
This answer has been confirmed as correct and helpful.
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