Question

(x-7)²=2x²+11x+23 помогите решить пожалуйста

Answer 1

${x}^{2} - 14x + 49 = 2 {x}^{2} + 11x + 23$
${x}^{2} + 25x - 26 = 0$
$625 - 4 times ( - 26) = 625 + 104 = 729$
$sqrt{d} = 27$
$x1 = frac{ - 25 + 27}{2} = 1$
$x2 = frac{ - 25 - 27}{2} = frac{ - 52}{2} = - 26$