1.（x+1)^2-16=0[(x+1)+4][(x+1)-4]=0(x+5)(x-3)=0x=-5或x=32.(x-1)(x+1)=8x^2-1-8=0x^2-9=0(x+3)(x-3)=0x=-3或x=33.(x-3)^2=4(3x+1)^2(x-3)^2-4(3x+1)^2=0[(x-3)-2(3x+1)][(x-3)+2(3x+1)]=0[-5x-5][7x-1]=0(x+1)(7x...