February 2019 0 28 Report
WYKONAJ DZIAŁANIA

a) (x+ 2y)kwadrat - (x+2y)(x-2y)+ 2(x-2y)kwadrat +4xy

b) (a-2b)(3a+b) -3(a-b) kwadrat

c) (5a +1)kwadrat +(5a-1) kwadrat -(5a+1)(5a-1)-25a2
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