Question

Possible choices:
{7+sqr8}
{-7+sqr7}
{8+sqr8}
{-8+sqr7}

Answer 1

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${(x - 8)}^{2} = 7$

${x}^{2} - 16x + 64 = 7$

${x}^{2} - 16x + 57 = 0$

${x}^{2} - 19x + 3x+ 57 = 0$

$x(x - 19) + 3(x + 19) = 0$

$(x + 3)(x±19) = 0$

x = -3

x = ±19