Question

com9 resolver essas equações ???​

Answer 1

f)

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

g)

$- 25 + 100 {x}^{2} = 0 \\ \\ 100 {x}^{2} = 25 \\ \\ \\ \sqrt{100 {x}^{2} } = ± \sqrt{25} \\ \\ 10x = ±5 \\ \\ \frac{10x}{10} = ± \frac{5}{10} \\ \\ x = ± \frac{1}{2} = ± \: 0.5$