wzory skroconego mnozenia
1. ( x + 5 ) do kwadratu=
2. ( x- 2) ( x+2 )=
3.(1+3x) do kwadratu=
4. ( pierw. z 3 - 2 pierw. z 7) do kwadratu =
usun niewymiernosc z mianownika :
5. 3
--------
pierw. z 5
6
3
----------
1+ pierw. z 2
7. 4x do kwadratu - (2x- 1 ) do kwadratu = 8
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1. x² + 2·x*5 + 5² = x²+10x+25
2. x²+2x-2x-4 = x²-4
3.1² + 2·1·3x +(3x)² = 1+6x+6x²
5. 3/√5 · √5/√5 = 3√5/5
6. 3/1+√2 = 3/1+√2 · 1+√2/1+√2 = 3√2/2
7. 4x² - (2x-1) = 8
nie rozumiem co z tym zrobic