January 2019 2 43 Report
Wyrażenie (a+1+3b)^2 jest równe
a)a^2+6b^2+6ab+2a+6b+1
b)a^2+6a+9b^2+1
c)a^2+3b^2+6ab+6b+1
d)a^2+3b^2+1
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