September 2018 1 16 Report

Doprowadź do najprostszej postaci.
a)
(2+a)²+(2-a)²-2²-a²=

b)
(2x+4)²-4x²-16=

c)

9x²-25+(3x-5)(3x+5)-2x=

d)

(7-y)²+(y+7)²+1 =


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