Eli5: Why is 2^9 + 2^9 = 2^10 390 viewsJanuary 3, 2024 Question91.94K February 15, 2022 0 Comments Middle school teacher here, and this is driving me crazy! Thanks! In: 2 14 Answers ActiveNewestOldest Anonymous Posted February 15, 2022 0 Comments 2^9 = 2*2*2*2*2*2*2*2*2. For any number x, x+x = 2*x, so 2^9 + 2^9 = 2*2^9 = 2*2*2*2*2*2*2*2*2*2 = 2^10. For a similar reason, 3^9 + 3^9 + 3^9 = 3^10. You are viewing 1 out of 14 answers, click here to view all answers. Register or Login
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