Odpowiedzi

2009-12-06T12:50:17+01:00
A) 5x-[5x-(6x-2)]+(x-8)=5x-5x+6x-2+x-8=7x-10
b)(a²-3b²)+[-(a²-2ab-b²)-2ab] = a²-3b²-a²+2ab+b²-2ab=-2b²
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