(11x_________)2=121x2________+196y2.
﹙11x+14y﹚²
=﹙11x﹚²+2×﹙11x﹚×﹙14y﹚+﹙14y﹚²
=121x²+308xy+196y²
(11x11)×2=121x2=46+196
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﹙11x+14y﹚²
=﹙11x﹚²+2×﹙11x﹚×﹙14y﹚+﹙14y﹚²
=121x²+308xy+196y²
(11x11)×2=121x2=46+196
上一篇:两套电脑丐配大神来看看那个更好点