4x²-3x-2=04(x²-3x/4)=24(x²-3x/4+9/64-9/64)=24[(x-3/8)²-9/64]=2(x-3/8)²-9/64=1/2(x-3/8)²=41/64x-3/8=±√41/8x1=(3-√41)/8 x2=(3+√41)/8