Question

( x - 5 )( x + 1 ) - (x + 4)(x - 1)

Answer 1

Ответ:

-7x-1

Объяснение:

( x - 5 )( x + 1 ) - (x + 4)(x - 1)

x (x + 1) - 5(x + 1) - (x + 4)(x - 1)

x² + x - 5(x + 1) - (x + 4)(x - 1)

x² + x - 5x - 5 - (x + 4)(x - 1)

x² - 4x - 5 - (x + 4)(x - 1)

x² - 4x - 5 - (x(x - 1) + 4(x - 1))

x² - 4x - 5 - (x² - x + 4(x - 1))

x² - 4x - 5 - (x² - x + 4x - 4)

x² - 4x - 5 - (x² + 3x - 4)

x² - 4x - 5 - x² - 3x + 4

x² - 4x - 1 - x² - 3x

-4x - 1 - 3x

-7x - 1