Question

Найдите значение выражения при X= 8.
(х^3 – 3х^2): (4x)​

Answer 1

$\frac{ {x}^{3} - 3 {x}^{2} }{4x} = \frac{x( {x}^{2} - 3x )}{4x} = \frac{ {x}^{2} - 3x }{4} = \frac{ {8}^{2} - 3 \times 8}{4} = \frac{64 - 24}{4} = \frac{40}{4} = 10$