GGray15 GGray15

30-05-2018
Mathematics

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Solve for the x-intercepts by completing the square: x^2 + 12x + 4 = 0

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30-05-2018

x^2 + 12x + 4 = 0

(x + 6)^2 - 36 + 4 = 0

(x + 6)^2 = 36 - 4 = 32

x + 6 = +/- sqrt32

x = -6 + sqrt32, - 6 - sqrt32

x = -0.34, -11.66 (answer) correct to nearest hundredth

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