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a²-4ab+4b²-9=(a-2b)²-3²=(a-2b+3)(a-2b-3)
wzory:
a²-b²=(a+b)(a-b)
a²-2ab+b²=(a-b)²
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a²-4ab+4b²-9=(a-2b)²-3²=(a-2b+3)(a-2b-3)
wzory:
a²-b²=(a+b)(a-b)
a²-2ab+b²=(a-b)²