Question

me ayudan porfa, es para entregar en 15 minutos ​

Answer 1

Explicación paso a paso:

$(x - 1) {}^{2} = 13 {}^{2} - 5 {}^{2} \\ x {}^{2} - 1 {}^{2} = 13 {}^{2} - 5 {}^{2} \\ x {}^{2} = 1 + 169 - 25 \\ x {}^{2} = 170 - 25 \\ x {}^{2} = 145 \\ x = 145 \div 2 \\ x = 72.5$