( -2 )2 = ( -2 )( -2 ) = 4
But, be careful, because:
-22 = ( -1 ) 22 = ( -1 )( 2 )( 2 ) = ( -1 )( 4 ) = -4
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-2 to the second power is (-2) x (-2) = +4
(-10) raised to 2 = 100
It is: 5^2 = 25
2 to the second power, written 2 with a superscript, (raised half a line to the right of the numeral 2).
It is 10x raised to the second power.