Odpowiedzi

2010-02-07T12:13:59+01:00
3(2-x)²+4(x-5)²=
3*(4-4x+x²)+4*(x²-10x+25)=
12-12x+3x²+4x²-40x+100=
112-52x+7x²
2010-02-07T12:16:26+01:00
3(4-4x+x²)+4(x²-10x+25)=12-12x+3x²+4x²-40x+100=7x²-52x+112