=> (x-0.35)x=0.52x²-0.35x=0.52 100x²-35x-52=0100x²-35x+49/16-49/16-52=0(10x-7/4)²-49/16-52=0（10x-7/4)²=881/1610x-7/4=根号881/410x=根号881/4+7/4x=（根...