aska: (x-3)(x+3)-(x+2)do potegi2-5=x+4

ALINA: Rozwiązanie:

(x-3)(x+3)-(x+2)²-5=x+4
(x²+3x-3x-9)-(x²+4x+4-5=x+4
(x²-9)-x²-4x-4-5=x+4
-9-4x-4-5-x=4
-18-5x=4
-5x=4+18
-5x=22 /: (-5)
x=-22/5
x=-4 2/5