Question

sabendo que a equação 25x^2-49=0,determine suas raizes

Answer 1

25X² - 49 = 0
25X² = 49
X² = 49/25
X = $\sqrt{ \frac{49}{25}}$
X = 7/5

Answer 2

$25x^2-49=0\to\\\\ 25x^2=49\to \\\\ x^{2} = \frac{49}{25} \to \\\\x=\pm \sqrt{\frac{49}{25} } \to \\\\x=\pm\frac{7}{5} \\\\\\ S=(-\frac{7}{5} ;\frac{7}{5} )$