题目有误 3.4654^2（应该是3.7654^2?）+0.2346^2+2.346×0.75308 3.7654^2+0.2346^2+2.346×0.75308 =3.7654^2+0.2346^2+0.2346×7.5308 =3.7654^2+0.2346^2+0.2346×(2×3.7654) =3.7654^2+2×0.2346×3.7654 +0.23...