Mathematics
Junior High

この問題の途中式をより詳しく書いて欲しいです

(5) 16x2+8x+1 =(4x)2+2x4xX1+12 =(4x+1)2 (a−5)² (10) 812-9 =(9x)2- (9x-5 (4x+1)2

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