Rozwiaz uzywajac wzorow skroconego mnozenia :
4(2-3x) (2+3x) - 5(4+7x)² =
4(2-3x)(2+3x) - 5(4+7x)² = 4(4-9x²) - 5(16 + 56x + 49x²) = 16 - 36x² - 80 - 280x - 245x² = -281x² - 280x - 64
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Litterarum radices amarae sunt, fructus iucundiores
Pozdrawiam :)
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4(2-3x)(2+3x) - 5(4+7x)² = 4(4-9x²) - 5(16 + 56x + 49x²) = 16 - 36x² - 80 - 280x - 245x² = -281x² - 280x - 64
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Litterarum radices amarae sunt, fructus iucundiores
Pozdrawiam :)