Question

2x la patrat+1=5
Help

Answer 1

$2 {x}^{2} + 1 = 5 \\ 2 {x}^{2} = 5 - 1 \\ 2 {x}^{2} = 4 \\ {x}^{2} = 4 \div 2 \\ {x}^{2} = 2 \\ x = + - \sqrt{2}$