Question

даю 35 баллов , помогите плз

Answer 1

$x^{2} -8x+16=25\\(x-4)^{2} = 25$

$x^{2} -8x+16=25\\ x^{2} -8x-9=0\\d= 64 - 4*(-9) = 64 + 36 =100\\x1=\frac{8+100}{2} = 54\\x2 = \frac{8-100}{2} = -46$

Ответ: x₁ = 54, x₂= –46