Respuestas

2014-01-29T21:58:58+01:00
X^2+X+2X+2-(12X^2-3X+20X-5)-6=8X-11(X^2+7X-3X-21)
X^2+X+2X+2-(-72X^2+18X-120X+30=8X-11X^2-77X+33X+231
X^2+X+2X+2+72X^2-18X+120X-30=8X-11X^2-77X+33X+231
X^2+X+2X+72X^2-18X+120X-8X+11X^2+77X-3X=231+30-2
84X^2+271X=259
84X^2+271X-259=0