== A number to the second power means 'squared,' so it is 15 x 15, which is 225. == 15 to the second power is nothing but 15 squared.
152 = (15 * 15) = 225. Therefore 15 to the second power is 225.
225
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2a to the second power. If you combine the like terms, (a to the second power + a to the second power), it would be the same as 2a to the second power.
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15 to the 2nd power or 15 squared equals 15 * 15 which equals 225.
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