Answer:
3 = 12
Explanation:
9 * (9+1) = 9 * 10 = 90
8 * (8+1) = 8 * 9 = 72
7 * (7+1) = 7 * 8 = 56
6 * (6+1) = 6 * 7 = 42
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Optional Steps (for bigger numbers):
Hence, the formula is
a = b(b+1)
= b² + b
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Hence,
3 * 4 = 12
Hence,
3 = 12
Hope this helps and be sure to have a wonderful time ahead! :D