用代数的眼光来看代数式 ,解决问题可能很复杂 ,如果换一个角度 ,用几何的眼光看代数式 ,或许会简单 .比如一类函数的最值问题 ,转化为距离问题求解就是如此 .例 1　 (第三届希望杯高二第一试试题 )设ｘ∈Ｒ ,函数ｆ(ｘ) =ｘ2 +3ｘ+3 +ｘ2 - 3ｘ+3的最小值为 .解　将函数式作如 Using algebraic perspectives to look at algebraic expressions, solving problems can be complicated. If you look at algebraic expressions from a geometric perspective, it may be simple. For example, the problem of the maximum value of a class of functions can be converted into a problem of distance problem solving. Example 1 ( The third hope cup high school first test questions) Let x∈R, the function f(x) =x2 +3x+3 +x2 - 3x+3 is the minimum value. The solution will be functional as