Question

Алгебра. производная

Answer 1

$f(x) = 5(2 {x}^{2} - 8x + 12) - 6.$

$f(x) = 10 {x}^{2} - 40x + 60 - 6.$

$f(x) = 10 {x}^{2} - 40x + 54.$

$f'(x) = 20x - 40.$

$f'(x) = 0.$

$20x - 40 = 0.$

$x = 2.$

Ответ: 2.