tolong no 1-10 jawabannya aja nggak usah pke cara

1.-8(c)
2.x²-3x+1 +10x-x²+2 = x²-x²-3x+10x+1+2 = 7x+3 (a)
3.3(2x+2)-(3x-4) = 6x+6-3x+4 = 6x-3x+6+4 = 3x +10 (a)
4.(2x+4)(3x+5) = 6x²+10x+12x+20 = 6x²+22x+20 (a)
5.(b)
6.x²-6x+5   n+m =-6  (-1+(-5)) nxm=5  (-1x-5)
     jadi jawabannya (x-1)(x-5) (c)
7.x+y-4-x+2+2y-x = x-x-x+y+2y-4+2 = -x+3y-2 (a)