October 2018 2 10 Report

Zapisz w jak najprostszej postaci :

a)2(x-y)(x+y)-(x-2y)^

b)(2a-b)^-2(a-b)(2a+b)

c)5(s+3t)(3t-s)-(s+2t)^

d)(z+0,3)^+(z+0,2)(0,2-z)


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