==new answer== The number two means receptivity or duality.
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2.
Twice a number means to multiply the number by 2
A number's opposite is the negitave of that number... the opposite of 2 is -2, the opposite of 947283 is -947283.
It means u multiply in by the number in the brackets EX- 2(3)= 2*3= 6
multiply the number by itselfRaising a number to the second power means you are squaring the number, multiplying it by itself. 2 squared= 2*2=43 squared=3*3=9