September 2018 2 19 Report

Wykonja działnia i oblicz wartośc liczbową wyrażenia:

a) 2x + 1 - ( 3x - 4) + 3x dla x= 3

b) 5a +2(3a -1) - 3 ( 4a-3)-2a dla a = -2

c) 0,1(2y - 1) - 2,5 (1-3y) - 2,5 dla y = -1

d) 5 ( 2 x - 3y) -4 ( -3 x +y) - ( 6x+7y) dla x= -3 : y=2

e) 2(x do kwadratu - 1) - 4(3 - 2x) + 3(6- x do kwadratu - x) dla x = 0,5


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