Question

Помогите пожалуйста срочно

Answer 1

1)
$\: x + 1 = 5 \\ x = 4$
или
$x + 1 = - 5 \\ x = - 6$
2)
$\frac{ {45}^{2} - {25}^{2} }{ {4.5}^{2} - {2.5}^{2} } \\ = \frac{(45 - 25)(45 + 25)}{(4.5 - 2.5)(4.5 + 2.5)} \\ = \frac{20 \times 70}{2 \times 7} = \\ = 10 \times 10 = 100$
3)
(x-1)^2=16
x-1=+-4
x=5 или х=-3