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Solve the quadratic equation by the square root property. 8x2 + 5 = 805 Here are the 4 multiple choices: {-11, 11}, {-10, 10}, {10}, {402.5} Please show the steps on how you came up with your answer. Thank you!
8x^2 + 5 = 805 8x^2 = 805 - 5 = 800 x^2 = 800/8 = 100 x = 10 or -10
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Asked 5/13/2013 3:04:27 PM
Updated 8/12/2014 3:02:25 AM
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8x^2 + 5 = 805
8x^2 = 805 - 5 = 800
x^2 = 800/8 = 100
x = 10 or -10
Added 8/12/2014 3:02:25 AM
This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [8/12/2014 2:50:37 PM]
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(2x - 1)^2 = 25
2x - 1 = ± 5
when 2x - 1 = 5 , x = 3
when 2x - 1 = -5, x = -2
So {-2, 3} is the answer for (2x - 1)^2 = 25 .
Added 9/21/2014 6:16:36 AM
This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [9/21/2014 10:26:35 AM], Rated good by andrewpallarca
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