2 - kwadrat
Rozwiaz rownanie: 4x2 = (5 - 2x)2
4x2=(5-2x)216x=25-4x16x+4x=2520x+25chyba tak ;P
4x² = (5 - 2x)²
4x² = 5² - 2 * 5 * 2x + (2x)²
4x² = 25 - 20x + 4x²
0 = 25 - 20x
20x = 25
x = 25 : 20
x = 25/20
x = 5/4
x = 1 i 1/4
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4x2=(5-2x)2
16x=25-4x
16x+4x=25
20x+25
chyba tak ;P
4x² = (5 - 2x)²
4x² = 5² - 2 * 5 * 2x + (2x)²
4x² = 25 - 20x + 4x²
0 = 25 - 20x
20x = 25
x = 25 : 20
x = 25/20
x = 5/4
x = 1 i 1/4