Mathematics
Senior High
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どこから計算違いますか?
(a+b+c) (a-b+c) (a+b-c) (a-b-c)
{(a+b)-(²} {(a-by-c}
= (a²+2ab+b² (²) (a² = 2ab+b² - (²)
= { ba₁² + b² = c² ) + zab} { ( a² + b²- (²)-zab}
〃
(a²+b²-c²)² - 4a²= b²
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