Question

x²-25=0 fazer conjunto resoluçao

Answer 1

$x^{2} -25=0 \\ \\ \Delta = 0 - (-100) \\ \Delta = 100 \\ \\ x = \frac{0 \pm \sqrt{100} }{2} = \frac{0 \pm 10}{2} \\ \\ x' = \frac{0+10}{2} = \frac{10}{2} = 5 \\ \\ x'' = \frac{0-10}{2} = \frac{-10}{2} = -5 \\ \\ \boxed{S = \{-5;5\}}$

Answer 2

Resposta:

$S=\{-5,5\}$

Explicação passo-a-passo:

$x^{2} -25=0\\x^{2} =0+25\\x^{2} =25\\x=\pm\sqrt{25} \\x=\pm\:5\\\\S=\{-5,5\}$