Wykonaj działania
(2x+5)(5-x) + (3x-7)(x-4)
_____________________ = < --- to jest kreska ułamkowa :D
(x-4)(5-x)
10x - 2x² + 25 - 5x + 3x² - 12x - 7x + 28
__________________________________ =
5x - x² -20 +4x
x² - 14x + 53
___________
-x² + 9x - 20
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(2x+5)(5-x) + (3x-7)(x-4)
_____________________ = < --- to jest kreska ułamkowa :D
(x-4)(5-x)
10x - 2x² + 25 - 5x + 3x² - 12x - 7x + 28
__________________________________ =
5x - x² -20 +4x
x² - 14x + 53
___________
-x² + 9x - 20