Решить уравнение ( x - 4 )( x + 4 ) - 6 x = ( x - 2 ) во 2-ой степени.
( x - 4)( x + 4) - 6x = ( x - 2)² x² - 16 - 6x = x² - 4x + 4 x² - x² - 6x + 4x = 4 + 16 - 2x = 20 2x = - 20 x = - 10