Question

x2-4x-60
$x ^{2} - 4x - 60$
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Answer 1

Respuesta:

X1 = 10 X2 = -6

Explicación paso a paso:

$x {}^{2} - 4x - 60 = 0 \\ x {}^{2} - 4x = 60 \\ x {}^{2} - 4x + ( \frac{4}{2} ) {}^{2} = 60 + ( \frac{4}{2} ) {}^{2} \\ x {}^{2} - 4x + 4 = 60 + 4 \\ x {}^{2} - 4x + 4 = 64 \\ (x - 2) {}^{2} = 64 \\ \sqrt{(x - 2) {}^{2} } = \sqrt{64} \\ x - 2 = ± \: 8 \\ x = 2 \: ±8 \\ x1 = 2 + 8 \: \: \: \: \: \: \: \: \: x2 = 2 - 8 \\ x1 = 10 \: \: \: \: \: \: \: \: \: x2 = - 6$