a) (x+3)^ - 2(3-x) (x+3) + 4 (3x -1)^ b) (2 -x) (x+2) - 4 (2x -1)^ +2 (x+3)^

a) x²+6x+9-2(3x+9-x²-3x)+4(9x²-6x+1)=x²+6x+9-6x-18+2x²+6x+36x²-24x+4=39x²-18x-5 b)4-x²-4(4x²-4x+1)+2(x²+6x+9)=4-x²-16x²+16x-4+2x²+12x+18=18-15x²+28x

a) (x+3)^ - 2(3-x) (x+3) + 4 (3x -1)^= x^+9 -2(3x+9-x^-3x) + 4(9x^+1)= x^+9 -18+2x^+36x^+4= 37x^-5 b) (2 -x) (x+2) - 4 (2x -1)^ +2 (x+3)^= 2x+4-x^-2x - 4(4x+1) +2(x^+9)= 2x+4-x^-2x - 16x -4 +2x^+18= x^-16x+18

a)=39x^-6x-10 (x+3)^ - 2(3-x) (x+3) + 4 (3x -1)^= (x+3)(x+3)-2[3x+9-x^-3x]+4[(3x-1)(3x-1)= x^+3x+3x+9-18+2x^+4[9x^-3x-1]= x^+6x-9+2x^+36x^-12x-1= 39x^-6x-10 b)=28x+26-7x^26-7x^ (2 -x) (x+2) - 4 (2x -1)^ +2 (x+3)^= (2 -x) (x+2) - 4 (2x -1)^ +2 (x+3)^= 2x+4-x^-2x-4[(2x-1)(2x-1)]+2[(x+3)(x+3)]= 2x+4-x^-2x-4[2x^-2x-2x-1]+2[x^+3x+3x+9]= 2x+4-x^- 2x-8x^+8x+8x+4+2x^+6x+6x+18= 28x+26-7x^