Question

Решите уравнение: (x–2)(x+2)–(x+4)² =0

Answer 1

Ответ:

$x_{1} = - 2.5$

Answer 2

(x – 2)(x + 2) – (x + 4)² = 0

x² – 4 – (x² + 8x + 16) = 0

x² – 4 – x² – 8x – 16 = 0

– 8x – 20 = 0

8х + 20 = 0

8х = –20

х = –(20/8) = –2,5

Ответ: –2,5