Odpowiedzi

2010-03-24T21:39:03+01:00
3(1-3x)² + (-1)(3x-5)(5+3x) - 2(3x+2)² =
= 3(1-6x+9x²) + (-3x+5)(5+3x) - 2(9x²+12x+4) =
= 3-18x+27x² + (-15x-9x²+25+15x) - 18x²-24x-8 =
= 3 - 18x + 27x² - 9x² + 25 - 18x² - 24x - 8 =
= 20 - 42x
2010-03-24T21:43:51+01:00
3(1-3x)²+(-1)(3x-5)(5+3x)-2(3x+2)²
3(1-6x+9x²)+(-1)(15x+9x²-25-15x)-2(9x²+12x+4)
3-18x+27x²-1(9x²-25)-18x²-24x-8
3-18x+27x²-9x²+25-18x²-24x-8
-42x+20