justinc10 justinc10

17-03-2019
Mathematics

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what are the solutions to the equation 2(a + 4)^2 -126 = 0

what are the solutions to the equation 2a 42 126 0 class=

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Kamikazeminem Kamikazeminem

17-03-2019

[tex]2{(a + 4)}^{2} - 126 = 0 \\ \Leftrightarrow 2{(a + 4)}^{2} = 126 \\ \Leftrightarrow {(a + 4)}^{2} = 63 \\ \Leftrightarrow a + 4 = \pm3 \sqrt{7} \\ \Leftrightarrow a = - 4\pm3 \sqrt{7} [/tex]

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