(x+1)²/12-(x-1)²/4=(2x-1)/4 (x+1)²-3(x-1)²=3(2x-1) x²+2x+1-3(x²-2x+1)=6x-3 x²+2x+1-3x²+6x-3-6x+3=0 -2x²+2x=0 x²-x=0 x(x-1)=0 x₁=0 x-1=0 x₂=1