Wzory skroconego mnożenia
1. 2(x-1)kwadrat- (x+3)kwadrat= x(x-2)+1
2. (X+4)kwadrat-(x+1)kwadrat=4(x-1)
3. 2(x-5)kwadrat-3(x+2)kwadrat=6-xkwadrat
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a)
b)
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