Question

Necesito ayuda es de ecuaciones cuadraticas, porfavooor

Answer 1

Explicación paso a paso:

${x}^{2} - 5x = 0 \\ x(x - 5) = 0 \\ x = 0 \: \: \: \: x - 5 = 0 \\ x = 0 \: \: \: x = 5$

${x}^{2} - 16 = 0 \\ {x}^{2} = 16 \\ x = \sqrt{16} \\ x = 4 \: \: \: x = - 4$

${x}^{2} - 49 = 0 \\ {x}^{2} = 49 \\ x = \sqrt{49} \\ x = 7 \: \: \: x = - 7$

$2 {x}^{2} - 18 = 0 \\ 2 {x}^{2} = 18 \\ \\ {x}^{2} = \frac{18}{2} \\ \\ {x}^{2} = 9 \\ x = \sqrt{9} \\ x = 3 \: \: \: x - 3$

$3 {x}^{2} - 11 = 0 \\ 3 {x}^{2} = 11 \\ \\ {x}^{2} = \frac{11}{3} \\ \\ {x}^{2} = 3.6667 \\ x = \sqrt{3.6667} \\ x = 1.91 \: \: \: x = - 1.91$

$- {x}^{2} + 12 = 0 \\ x( - x + 12) = 0 \\ x = 0 \: \: \: - x + 12 = 0 \\ x = 0 \: \: \: 12 = x$