1.5x^2-10x+5-2x^2-12x-18=3x^2+18x+27-42x+7
-22x-13=34-24x
2x=47
所以x=47/2
2.解
(1-3y)^2+(2y+1)^2>13(y-1)(y+1)
1-6y+9y²+4y²+4y+1>13y²-13
-2y>-13-2
y<7.5
1.5x^2-10x+5-2x^2-12x-18=3x^2+18x+27-42x+7
-22x-13=34-24x
2x=47
所以x=47/2
2.解
(1-3y)^2+(2y+1)^2>13(y-1)(y+1)
1-6y+9y²+4y²+4y+1>13y²-13
-2y>-13-2
y<7.5