littlebitty1999 littlebitty1999

23-05-2022
Mathematics

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If using the method of completing the square to solve the quadratic equation x² + 20x6 = 0, which number would have to be added to "complete th square"?

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angstar4 angstar4

23-05-2022

Is the equation x^2 + 20x + 6?

CTS: (b/2)^2 = 20/2 ^ 2 = 10^2 = 100

x^2 + 20x + 6 + 100 = 100
x^2 + 20x + 100 = 100 - 6
(x + 10)^2 = 94
x + 10 = square root (94)
x = -10 +/- square root (94)

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