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在运用勾股定理进行解题或计算时,若能与乘法公式或其变形公式如a~2+b~2=(a+b)~2-2ab等结合起来,常常会使解题过程变得简捷、明快,收到出奇制胜的效果.
When using the Pythagorean theorem to solve problems or calculations, if combined with a multiplication formula or its deformation formula such as a~2+b~2=(a+b)~2-2ab, it will often make the problem-solving process changeable. It is simple and clear, and it receives surprising results.