Question

2. Resuelve
lo
siguiente ecuacion X² + (7 x ² = 25​

Answer 1

${x}^{2} + {7x}^{2} = 25 \\ {8x}^{2} = 25 \\ {x}^{2} = \frac{25}{8} \\ x = \sqrt{ \frac{25}{8} } \\ x = \frac{5}{ \sqrt{8} } \\ x = \frac{5}{ \sqrt{8} } \times \frac{ \sqrt{8} }{ \sqrt{8} } \\ x = \frac{5 \sqrt{8} }{8}$