October 2018 2 86 Report

Wykonaj mnożenie i zredukuj wyrazy podobne a) (2a-4) (5a+6) + 2a do kwadratu b) (3b-2a) (6a+4b) + 3ab c) (7a-3) (3+7a) - 5a do kwadratu d) (3x+4y) (3x-6y) + 5xy 2. Oblicz wartość wyrażenia a) 6a +15b-7 dla a=5, b=-3 b) 8a-6b+13 dla a=7, b=5 c) 4x+5y-7 dla x=8, y=6


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