Question

спростити вираз: (х – 3)·(х + 3) – (х – 5)2

Answer 1

(х-3)(х+3)-(х-5)2= х²-9-2х+10=х²-2х+1

Answer 2

Ответ:

(х – 3)·(х + 3) – (х – 5)²

x²-9-(x²-10x+25)

x²-9-x²+10x-25

-9+10x-25

-34+10x