September 2018 2 33 Report

Zapisz w jak najprostrzej postaci :

a) 6a² - 3c + 2a²- 5c -10a² + c=

b) 2(5x-7y)-(3y-7x)=

c)(5+2x)(3x-2)=

d)2x(4x-1)-(x-2)(x+2)=

Rozwiąż układy równań :

x+5y=8 x-y=3

2x-y=5 3(x-2)=2x+y ( te klamry z przodu : D


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