Penjelasan dengan langkah-langkah:
21² + 21
= ( 21 × 21 ) + 21
= 441 + 21
= 462
= (21.21) + 21
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Penjelasan dengan langkah-langkah:
21² + 21
= ( 21 × 21 ) + 21
= 441 + 21
= 462
21² + 21
= (21.21) + 21
= 441 + 21
= 462