October 2018 1 16 Report

1.Zapisz w postaci iloczynu :

a) (a-1)²-(b+2)²

b) 1-(a-2b)²

c) a²-4ab+4b²-9

d) 81-c²-6cd-9d²

2.Zapisz w postaci iloczynu :

a) x²-2x-3

b) y²-4y-5

c) z²-2x²

d) 3-w²-2w

3.Oblicz.Skorzystaj ze wzorów skróconego mnożenia .

a) 31·29

b) 1005·995

c) 38·42

d) 53·47


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