August 2018 1 11 Report
Rozwiąż nastepujące równania :

a) 1,2x²+(x+5)²-2(x+7)(x-7)=(x-6)²

b) (2x-3)²-(1-x)(1+x)+x=(3x-1)²+(1-2x)(2x+1)-9

c) (x-⅓)²-(x+2)(x-2)+ ⁸/₉ = (x+5)²- x²- ⅔x

odpowiedzi do zadań :
a) -4
b) 3
c) -2

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